139142556 has 72 divisors (see below), whose sum is σ = 419652240. Its totient is φ = 39753504.

The previous prime is 139142519. The next prime is 139142557. The reversal of 139142556 is 655241931.

139142556 is a `hidden beast` number, since 13 + 91 + 4 + 2 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 139142556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139142557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7855 + ... + 18438.

Almost surely, 2^139142556 is an apocalyptic number.

It is an amenable number.

139142556 is an abundant number, since it is smaller than the sum of its proper divisors (280509684).

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

139142556 is a wasteful number, since it uses less digits than its factorization.

139142556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26320 (or 26305 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 139142556 is about 11795.8702943022. The cubic root of 139142556 is about 518.1871736540.

The spelling of 139142556 in words is "one hundred thirty-nine million, one hundred forty-two thousand, five hundred fifty-six".