139956 has 24 divisors (see below), whose sum is σ = 332640. Its totient is φ = 45792.

The previous prime is 139943. The next prime is 139967. The reversal of 139956 is 659931.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139956.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230 + ... + 1338.

It is an arithmetic number, because the mean of its divisors is an integer number (13860).

2¹³⁹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

139956 is an abundant number, since it is smaller than the sum of its proper divisors (192684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139956 is a wasteful number, since it uses less digits than its factorization.

139956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 221 counting only the distinct ones).

The product of its digits is 7290, while the sum is 33.

The square root of 139956 is about 374.1069365836. The cubic root of 139956 is about 51.9195006928.

The spelling of 139956 in words is "one hundred thirty-nine thousand, nine hundred fifty-six".