15972725 has 12 divisors (see below), whose sum is σ = 20001696. Its totient is φ = 12652080.

The previous prime is 15972713. The next prime is 15972731. The reversal of 15972725 is 52727951.

It is not a de Polignac number, because 15972725 - 2⁶ = 15972661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 527 + ... + 5676.

It is an arithmetic number, because the mean of its divisors is an integer number (1666808).

Almost surely, 2^15972725 is an apocalyptic number.

It is an amenable number.

15972725 is a deficient number, since it is larger than the sum of its proper divisors (4028971).

15972725 is a wasteful number, since it uses less digits than its factorization.

15972725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316 (or 6311 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The square root of 15972725 is about 3996.5891707805. The cubic root of 15972725 is about 251.8409437624.

The spelling of 15972725 in words is "fifteen million, nine hundred seventy-two thousand, seven hundred twenty-five".