15975625 has 10 divisors (see below), whose sum is σ = 19963922. Its totient is φ = 12780000.

The previous prime is 15975623. The next prime is 15975671. The reversal of 15975625 is 52657951.

It can be written as a sum of positive squares in 5 ways, for example, as 3732624 + 12243001 = 1932^2 + 3499^2 .

It is not a de Polignac number, because 15975625 - 2¹ = 15975623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15975623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12156 + ... + 13405.

Almost surely, 2^15975625 is an apocalyptic number.

It is an amenable number.

15975625 is a deficient number, since it is larger than the sum of its proper divisors (3988297).

15975625 is an frugal number, since it uses more digits than its factorization.

15975625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25581 (or 25566 counting only the distinct ones).

The product of its digits is 94500, while the sum is 40.

The square root of 15975625 is about 3996.9519636843. The cubic root of 15975625 is about 251.8561842122.

The spelling of 15975625 in words is "fifteen million, nine hundred seventy-five thousand, six hundred twenty-five".