125129512 has 8 divisors (see below), whose sum is σ = 234617850. Its totient is φ = 62564752.

The previous prime is 125129509. The next prime is 125129531. The reversal of 125129512 is 215921521.

It can be written as a sum of positive squares in only one way, i.e., 125126596 + 2916 = 11186^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820587 + ... + 7820602.

Almost surely, 2^125129512 is an apocalyptic number.

It is an amenable number.

125129512 is a deficient number, since it is larger than the sum of its proper divisors (109488338).

125129512 is a wasteful number, since it uses less digits than its factorization.

125129512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15641195 (or 15641191 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 125129512 is about 11186.1303407389. The cubic root of 125129512 is about 500.1726230624.

The spelling of 125129512 in words is "one hundred twenty-five million, one hundred twenty-nine thousand, five hundred twelve".