139971156 has 24 divisors (see below), whose sum is σ = 351722784. Its totient is φ = 43068000.

The previous prime is 139971121. The next prime is 139971211. The reversal of 139971156 is 651179931.

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 7 ways as a sum of consecutive naturals, for example, 448470 + ... + 448781.

It is an arithmetic number, because the mean of its divisors is an integer number (14655116).

Almost surely, 2^139971156 is an apocalyptic number.

It is an amenable number.

139971156 is an abundant number, since it is smaller than the sum of its proper divisors (211751628).

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

139971156 is a wasteful number, since it uses less digits than its factorization.

139971156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897271 (or 897269 counting only the distinct ones).

The product of its digits is 51030, while the sum is 42.

The square root of 139971156 is about 11830.9406219455. The cubic root of 139971156 is about 519.2137476644.

The spelling of 139971156 in words is "one hundred thirty-nine million, nine hundred seventy-one thousand, one hundred fifty-six".