125979165 has 64 divisors (see below), whose sum is σ = 251758080. Its totient is φ = 59304960.

The previous prime is 125979157. The next prime is 125979179. The reversal of 125979165 is 561979521.

It is not a de Polignac number, because 125979165 - 2³ = 125979157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 125979165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38805 + ... + 41925.

It is an arithmetic number, because the mean of its divisors is an integer number (3933720).

Almost surely, 2^125979165 is an apocalyptic number.

125979165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125979165 is a deficient number, since it is larger than the sum of its proper divisors (125778915).

125979165 is a wasteful number, since it uses less digits than its factorization.

125979165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171 (or 3165 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The square root of 125979165 is about 11224.0440572906. The cubic root of 125979165 is about 501.3021591525.

The spelling of 125979165 in words is "one hundred twenty-five million, nine hundred seventy-nine thousand, one hundred sixty-five".