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145 (number) : ウィキペディア英語版 | 145 (number)
145 (one hundred () forty-five) is the natural number following 144 and preceding 146. == In mathematics ==
* Although composite, 145 is a pseudoprime. * Given 145, the Mertens function returns 0. * 145 is a pentagonal number and a centered square number. * . 145 is the fourth number that is the sum of two different pairs of squares. Also, 145 is the result of 34 + 43, making it a Leyland number. * , making it a factorion. The only other numbers that have the property that they are the sum of the factorials of their digits are 1, 2 and 40585.
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