125163009 has 16 divisors (see below), whose sum is σ = 186395200. Its totient is φ = 83006208.

The previous prime is 125163001. The next prime is 125163019. The reversal of 125163009 is 900361521.

125163009 is a `hidden beast` number, since 1 + 25 + 1 + 630 + 0 + 9 = 666.

It is not a de Polignac number, because 125163009 - 2³ = 125163001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125163001) 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, 6799 + ... + 17220.

It is an arithmetic number, because the mean of its divisors is an integer number (11649700).

Almost surely, 2^125163009 is an apocalyptic number.

It is an amenable number.

125163009 is a deficient number, since it is larger than the sum of its proper divisors (61232191).

125163009 is a wasteful number, since it uses less digits than its factorization.

125163009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24221 (or 24215 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 125163009 is about 11187.6274964802. The cubic root of 125163009 is about 500.2172509237.

The spelling of 125163009 in words is "one hundred twenty-five million, one hundred sixty-three thousand, nine".