7853

This number is a prime.

+ 7853 is the largest prime factor of the number written with three ones: 11! - 1 = 13 * 17 * 23 * 7853. [Post]

+ The largest 4-digit prime made up from the complementary digits of the smallest distinct-prime-digit emirp, 3257. [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)

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