139015520 has 48 divisors (see below), whose sum is σ = 375344928. Its totient is φ = 47662080.

The previous prime is 139015483. The next prime is 139015537. The reversal of 139015520 is 25510931.

It is a self number, because there is not a number n which added to its sum of digits gives 139015520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60941 + ... + 63180.

It is an arithmetic number, because the mean of its divisors is an integer number (7819686).

Almost surely, 2^139015520 is an apocalyptic number.

139015520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139015520 is an abundant number, since it is smaller than the sum of its proper divisors (236329408).

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

139015520 is a wasteful number, since it uses less digits than its factorization.

139015520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124143 (or 124135 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 139015520 is about 11790.4842987894. The cubic root of 139015520 is about 518.0294254389.

The spelling of 139015520 in words is "one hundred thirty-nine million, fifteen thousand, five hundred twenty".