3516

3516 = 2 x 2 x 3 x 293.

3516 is a centered pentagonal number (A005891).

3516 is a member of the Fibonacci-like sequence beginning with 5 and 12 (A022137).

3516 is a number n such that n + 1, n² + 1, and n⁴ + 1 are all primes (A070325). It is a number n such that n² + 5 and n² + 7 are twin primes (A127845).

3516 and the square of 3516 use only the digits 1, 2, 3, 5, and 6 (A136974).

Source: On-Line Encyclopedia of Integer Sequences