125609815 has 8 divisors (see below), whose sum is σ = 150868368. Its totient is φ = 100396800.

The previous prime is 125609807. The next prime is 125609851. The reversal of 125609815 is 518906521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125609815 - 2³ = 125609807 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 7 ways as a sum of consecutive naturals, for example, 4986 + ... + 16615.

It is an arithmetic number, because the mean of its divisors is an integer number (18858546).

Almost surely, 2^125609815 is an apocalyptic number.

125609815 is a deficient number, since it is larger than the sum of its proper divisors (25258553).

125609815 is a wasteful number, since it uses less digits than its factorization.

125609815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22769.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 125609815 is about 11207.5784628081. The cubic root of 125609815 is about 500.8117680188.

The spelling of 125609815 in words is "one hundred twenty-five million, six hundred nine thousand, eight hundred fifteen".