139645756 has 12 divisors (see below), whose sum is σ = 244622560. Its totient is φ = 69753600.

The previous prime is 139645747. The next prime is 139645777. The reversal of 139645756 is 657546931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12645 + ... + 20956.

Almost surely, 2^139645756 is an apocalyptic number.

It is an amenable number.

139645756 is a deficient number, since it is larger than the sum of its proper divisors (104976804).

139645756 is a wasteful number, since it uses less digits than its factorization.

139645756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34644 (or 34642 counting only the distinct ones).

The product of its digits is 680400, while the sum is 46.

The square root of 139645756 is about 11817.1805435984. The cubic root of 139645756 is about 518.8110855438.

The spelling of 139645756 in words is "one hundred thirty-nine million, six hundred forty-five thousand, seven hundred fifty-six".