5873

5873 = 7 x 839.

5873 divides 1¹ + 2² + 3³ + . . . + 5873⁵⁸⁷³ (A128981).

5873 is a number n such that n divides the sum of the first n numbers from Flavius Josephus's sieve (A218665).

Source: What's Special About This Number?