15765625 has 14 divisors (see below), whose sum is σ = 19726310. Its totient is φ = 12600000.

The previous prime is 15765619. The next prime is 15765641. The reversal of 15765625 is 52656751.

It can be written as a sum of positive squares in 7 ways, for example, as 15492096 + 273529 = 3936^2 + 523^2 .

It is not a de Polignac number, because 15765625 - 2⁵ = 15765593 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15121 + ... + 16129.

Almost surely, 2^15765625 is an apocalyptic number.

It is an amenable number.

15765625 is a deficient number, since it is larger than the sum of its proper divisors (3960685).

15765625 is an frugal number, since it uses more digits than its factorization.

15765625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1014 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The square root of 15765625 is about 3970.5950435671. The cubic root of 15765625 is about 250.7477611829.

The spelling of 15765625 in words is "fifteen million, seven hundred sixty-five thousand, six hundred twenty-five".