3750

3750 = 2 x 3 x 5 x 5 x 5 x 5 (A143207).

3750 is a concentric hexagonal number (A032528).

3750 is the first of four consecutive squareful numbers (A070284).

3750 is 110000 in base 5 (A033042).

3750 is the sum of two powers of 5 (A055237).

3750 is a number n such that n and the square of n are sums of two successive primes (A213739).

Source: What's Special About This Number