139564520 has 32 divisors (see below), whose sum is σ = 314474400. Its totient is φ = 55745088.

The previous prime is 139564517. The next prime is 139564531. The reversal of 139564520 is 25465931.

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, 30971 + ... + 35189.

It is an arithmetic number, because the mean of its divisors is an integer number (9827325).

Almost surely, 2^139564520 is an apocalyptic number.

139564520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139564520 is an abundant number, since it is smaller than the sum of its proper divisors (174909880).

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

139564520 is a wasteful number, since it uses less digits than its factorization.

139564520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5057 (or 5053 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 139564520 is about 11813.7428446704. The cubic root of 139564520 is about 518.7104635277.

The spelling of 139564520 in words is "one hundred thirty-nine million, five hundred sixty-four thousand, five hundred twenty".