125669815 has 16 divisors (see below), whose sum is σ = 162441216. Its totient is φ = 93060000.

The previous prime is 125669807. The next prime is 125669833. The reversal of 125669815 is 518966521.

It is not a de Polignac number, because 125669815 - 2³ = 125669807 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 15 ways as a sum of consecutive naturals, for example, 14061 + ... + 21190.

It is an arithmetic number, because the mean of its divisors is an integer number (10152576).

Almost surely, 2^125669815 is an apocalyptic number.

125669815 is a deficient number, since it is larger than the sum of its proper divisors (36771401).

125669815 is a wasteful number, since it uses less digits than its factorization.

125669815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35310.

The product of its digits is 129600, while the sum is 43.

The square root of 125669815 is about 11210.2549034355. The cubic root of 125669815 is about 500.8914961910.

The spelling of 125669815 in words is "one hundred twenty-five million, six hundred sixty-nine thousand, eight hundred fifteen".