139155972 has 48 divisors (see below), whose sum is σ = 330758400. Its totient is φ = 45527040.

The previous prime is 139155971. The next prime is 139156037. The reversal of 139155972 is 279551931.

It is not an unprimeable number, because it can be changed into a prime (139155971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216772 + ... + 217412.

It is an arithmetic number, because the mean of its divisors is an integer number (6890800).

Almost surely, 2^139155972 is an apocalyptic number.

139155972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139155972 is an abundant number, since it is smaller than the sum of its proper divisors (191602428).

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

139155972 is a wasteful number, since it uses less digits than its factorization.

139155972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 954 counting only the distinct ones).

The product of its digits is 85050, while the sum is 42.

The square root of 139155972 is about 11796.4389541929. The cubic root of 139155972 is about 518.2038274991.

The spelling of 139155972 in words is "one hundred thirty-nine million, one hundred fifty-five thousand, nine hundred seventy-two".