15972875 has 16 divisors (see below), whose sum is σ = 20318688. Its totient is φ = 12532000.

The previous prime is 15972871. The next prime is 15972953. The reversal of 15972875 is 57827951.

It is not a de Polignac number, because 15972875 - 2² = 15972871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15972871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5420 + ... + 7830.

It is an arithmetic number, because the mean of its divisors is an integer number (1269918).

Almost surely, 2^15972875 is an apocalyptic number.

15972875 is a deficient number, since it is larger than the sum of its proper divisors (4345813).

15972875 is an equidigital number, since it uses as much as digits as its factorization.

15972875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2469 counting only the distinct ones).

The product of its digits is 176400, while the sum is 44.

The square root of 15972875 is about 3996.6079367384. The cubic root of 15972875 is about 251.8417321068.

The spelling of 15972875 in words is "fifteen million, nine hundred seventy-two thousand, eight hundred seventy-five".