125642564 has 6 divisors (see below), whose sum is σ = 219874494. Its totient is φ = 62821280.

The previous prime is 125642551. The next prime is 125642623. The reversal of 125642564 is 465246521.

It can be written as a sum of positive squares in only one way, i.e., 113252164 + 12390400 = 10642^2 + 3520^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15705317 + ... + 15705324.

It is an arithmetic number, because the mean of its divisors is an integer number (36645749).

Almost surely, 2^125642564 is an apocalyptic number.

It is an amenable number.

125642564 is a deficient number, since it is larger than the sum of its proper divisors (94231930).

125642564 is a wasteful number, since it uses less digits than its factorization.

125642564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31410645 (or 31410643 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 125642564 is about 11209.0393879226. The cubic root of 125642564 is about 500.8552881302.

The spelling of 125642564 in words is "one hundred twenty-five million, six hundred forty-two thousand, five hundred sixty-four".