15956625 has 32 divisors (see below), whose sum is σ = 28124928. Its totient is φ = 8006400.

The previous prime is 15956587. The next prime is 15956627. The reversal of 15956625 is 52665951.

It is not a de Polignac number, because 15956625 - 2¹⁴ = 15940241 is a prime.

It is a super-2 number, since 2×15956625² = 509227762781250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15956627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5124 + ... + 7626.

It is an arithmetic number, because the mean of its divisors is an integer number (878904).

Almost surely, 2^15956625 is an apocalyptic number.

15956625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15956625 is a deficient number, since it is larger than the sum of its proper divisors (12168303).

15956625 is a wasteful number, since it uses less digits than its factorization.

15956625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2528 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 15956625 is about 3994.5744454197. The cubic root of 15956625 is about 251.7562994229.

The spelling of 15956625 in words is "fifteen million, nine hundred fifty-six thousand, six hundred twenty-five".