125405636 has 6 divisors (see below), whose sum is σ = 219459870. Its totient is φ = 62702816.

The previous prime is 125405629. The next prime is 125405647. The reversal of 125405636 is 636504521.

It can be written as a sum of positive squares in only one way, i.e., 98883136 + 26522500 = 9944^2 + 5150^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15675701 + ... + 15675708.

It is an arithmetic number, because the mean of its divisors is an integer number (36576645).

Almost surely, 2^125405636 is an apocalyptic number.

It is an amenable number.

125405636 is a deficient number, since it is larger than the sum of its proper divisors (94054234).

125405636 is a wasteful number, since it uses less digits than its factorization.

125405636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31351413 (or 31351411 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 125405636 is about 11198.4657877765. The cubic root of 125405636 is about 500.5402640193.

The spelling of 125405636 in words is "one hundred twenty-five million, four hundred five thousand, six hundred thirty-six".