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4000 (four thousand) is the natural number following 3999 and preceding 4001. It is a decagonal number. == Selected numbers in the range 4001–4999 == * 4005 – triangular number * 4007 – safe prime * 4010 – magic constant of ''n''×''n'' normal magic square and ''n''-queens problem for ''n'' = 20. * 4013 – balanced prime * 4019 – Sophie Germain prime * 4028 – sum of the first 45 primes * 4030 – third weird number * 4031 – sum of the cubes of the first six primes * 4032 – pronic number * 4033 – sixth super-Poulet number; strong pseudoprime in base 2 * 4060 – tetrahedral number * 4073 – Sophie Germain prime * 4079 – safe prime * 4092 - an occasional glitch in the game The Legend of Zelda: Ocarina of Time causes the Gossip Stones to say this number * 4095 – triangular number, odd abundant number, Mersenne number * 4096 – power of two ; ; 16th cube; smallest number with exactly 13 divisors; a superperfect number * 4104 – (taxicab number) * 4127 – safe prime * 4139 – safe prime * 4140 – Bell number * 4141 – centered square number * 4147 – smallest cyclic number in duodecimal * 4160 – pronic number * 4166 – centered heptagonal number, 7! − 6! − 5! − 4! − 3! − 2! − 1! − 0! * 4167 – 7! − 6! − 5! − 4! − 3! − 2! − 1! * 4168 – 7! − 6! − 5! − 4! − 3! − 2! * 4170 – 7! − 6! − 5! − 4! − 3! * 4176 – 7! − 6! − 5! − 4! * 4181 – Fibonacci number, Markov number * 4186 – triangular number * 4187 – factor of R13. Also record number of wickets taken in first-class cricket by Wilfred Rhodes. * 4199 – highly cototient number, product of three consecutive primes * 4200 – nonagonal number, pentagonal pyramidal number, 7! − 6! − 5! * 4210 – 11th semi-meandric number * 4211 – Sophie Germain prime * 4219 – cuban prime of the form x = y + 1 * 4223 – Kynea number * 4225 – , centered octagonal number * 4227 – sum of the first 46 primes * 4240 – Leyland number * 4257 – decagonal number * 4259 – safe prime * 4271 – Sophie Germain prime * 4278 – triangular number * 4283 – safe prime * 4289 – highly cototient number * 4290 – pronic number * 4320 – 7! − 6! * 4324 – 23rd square pyramidal number * 4325 – centered square number * 4349 – Sophie Germain prime * 4356 – , sum of the cubes of the first eleven integers * 4359 – perfect totient number * 4369 – seventh super-Poulet number * 4371 – triangular number * 4373 – Sophie Germain prime * 4375 – perfect totient number (the smallest not divisible by 3) * 4391 – Sophie Germain prime * 4397 – Year of Comet Hale–Bopp's return, a prime number * 4400 – the number of missing persons in the sci-fi show ''The 4400'' * 4409 – Sophie Germain prime, highly cototient number, balanced prime * 4411 – centered heptagonal number * 4421 – alternating factorial * 4422 – pronic number * 4438 – sum of the first 47 primes * 4446 – nonagonal number * 4447 – cuban prime of the form ''x'' = ''y'' + 1 * 4457 – balanced prime * 4465 – triangular number * 4481 – Sophie Germain prime * 4489 – , centered octagonal number * 4495 – tetrahedral number * 4503 – largest number not the sum of four or fewer squares of composites * 4505 – fifth Zeisel number * 4513 – centered square number * 4522 – decagonal number * 4547 – safe prime * 4556 – pronic number * 4560 – triangular number * 4579 – octahedral number * 4597 – balanced prime * 4607 – Woodall number * 4619 – highly cototient number * 4624 – * 4641 – magic constant of ''n''×''n'' normal magic square and ''n''-queens problem for ''n'' = 21. * 4656 – triangular number * 4657 – balanced prime * 4661 – sum of the first 48 primes * 4663 – centered heptagonal number * 4679 – safe prime * 4681 – eighth super-Poulet number * 4691 – balanced prime * 4692 – pronic number * 4699 – nonagonal number * 4703 – safe prime * 4705 – , centered square number * 4727 – sum of the squares of the first twelve primes * 4733 – Sophie Germain prime * 4753 – triangular number * 4761 – , centered octagonal number * 4787 – safe prime * 4788 – 14th Keith number * 4793 – Sophie Germain prime * 4795 – decagonal number * 4799 – safe prime * 4801 – cuban prime of the form x = y + 2, smallest prime with a composite sum of digits in base 7 * 4830 – pronic number * 4851 – triangular number, pentagonal pyramidal number * 4862 – Catalan number * 4871 – Sophie Germain prime * 4879 – 11th Kaprekar number * 4888 – sum of the first 49 primes * 4900 – , the only square-pyramidal square other than 1() * 4901 – centered square number * 4913 – 17th cube * 4919 – Sophie Germain prime, safe prime * 4922 – centered heptagonal number * 4941 – centered cube number * 4943 – Sophie Germain prime * 4950 – triangular number, 12th Kaprekar number * 4959 – nonagonal number * 4960 – tetrahedral number; greater of fourth pair of Smith brothers * 4970 – pronic number * 4991 – Lucas–Carmichael number * 4993 – balanced prime 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「4000 (number)」の詳細全文を読む スポンサード リンク
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