125249636 has 6 divisors (see below), whose sum is σ = 219186870. Its totient is φ = 62624816.

The previous prime is 125249633. The next prime is 125249671. The reversal of 125249636 is 636942521.

It can be written as a sum of positive squares in only one way, i.e., 124188736 + 1060900 = 11144^2 + 1030^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125249636.

It is not an unprimeable number, because it can be changed into a prime (125249633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656201 + ... + 15656208.

It is an arithmetic number, because the mean of its divisors is an integer number (36531145).

Almost surely, 2^125249636 is an apocalyptic number.

It is an amenable number.

125249636 is a deficient number, since it is larger than the sum of its proper divisors (93937234).

125249636 is a wasteful number, since it uses less digits than its factorization.

125249636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31312413 (or 31312411 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 125249636 is about 11191.4983804672. The cubic root of 125249636 is about 500.3326266699.

The spelling of 125249636 in words is "one hundred twenty-five million, two hundred forty-nine thousand, six hundred thirty-six".