15957125 has 8 divisors (see below), whose sum is σ = 19914648. Its totient is φ = 12765600.

The previous prime is 15957121. The next prime is 15957127. The reversal of 15957125 is 52175951.

It can be written as a sum of positive squares in 4 ways, for example, as 4674244 + 11282881 = 2162^2 + 3359^2 .

It is not a de Polignac number, because 15957125 - 2² = 15957121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15957121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63704 + ... + 63953.

It is an arithmetic number, because the mean of its divisors is an integer number (2489331).

Almost surely, 2^15957125 is an apocalyptic number.

It is an amenable number.

15957125 is a deficient number, since it is larger than the sum of its proper divisors (3957523).

15957125 is an equidigital number, since it uses as much as digits as its factorization.

15957125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127672 (or 127662 counting only the distinct ones).

The product of its digits is 15750, while the sum is 35.

The square root of 15957125 is about 3994.6370298189. The cubic root of 15957125 is about 251.7589289855.

The spelling of 15957125 in words is "fifteen million, nine hundred fifty-seven thousand, one hundred twenty-five".