125639516 has 12 divisors (see below), whose sum is σ = 220033632. Its totient is φ = 62772768.

The previous prime is 125639509. The next prime is 125639551. The reversal of 125639516 is 615936521.

It is a self number, because there is not a number n which added to its sum of digits gives 125639516.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5345 + ... + 16728.

It is an arithmetic number, because the mean of its divisors is an integer number (18336136).

Almost surely, 2^125639516 is an apocalyptic number.

It is an amenable number.

125639516 is a deficient number, since it is larger than the sum of its proper divisors (94394116).

125639516 is a wasteful number, since it uses less digits than its factorization.

125639516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23500 (or 23498 counting only the distinct ones).

The product of its digits is 48600, while the sum is 38.

The square root of 125639516 is about 11208.9034254025. The cubic root of 125639516 is about 500.8512379654.

The spelling of 125639516 in words is "one hundred twenty-five million, six hundred thirty-nine thousand, five hundred sixteen".