2537

2537 = 43 x 59.

2537 is a semiprime with distinct prime digits (A108632).

2537 is the smallest number that can be expressed as the sum of a prime number and a nonzero square in just 20 different ways (A064283).

2537 is the sum of all the primes raised to their corresponding powers: 2537 = 2¹ + 3² + 5³ + 7⁴ (A087480).

2537 is a composite number such that exactly eight distinct permutations of digits give primes (A163560).

Source: On-Line Encyclopedia of Integer Sequences