139631252 has 24 divisors (see below), whose sum is σ = 255687936. Its totient is φ = 66594528.

The previous prime is 139631249. The next prime is 139631267. The reversal of 139631252 is 252136931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34613 + ... + 38435.

It is an arithmetic number, because the mean of its divisors is an integer number (10653664).

Almost surely, 2^139631252 is an apocalyptic number.

It is an amenable number.

139631252 is a deficient number, since it is larger than the sum of its proper divisors (116056684).

139631252 is a wasteful number, since it uses less digits than its factorization.

139631252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247 (or 4245 counting only the distinct ones).

The product of its digits is 9720, while the sum is 32.

The square root of 139631252 is about 11816.5668449004. The cubic root of 139631252 is about 518.7931231969.

The spelling of 139631252 in words is "one hundred thirty-nine million, six hundred thirty-one thousand, two hundred fifty-two".