139231572 has 24 divisors (see below), whose sum is σ = 332798592. Its totient is φ = 45278400.

The previous prime is 139231559. The next prime is 139231577. The reversal of 139231572 is 275132931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139231577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141004 + ... + 141987.

It is an arithmetic number, because the mean of its divisors is an integer number (13866608).

Almost surely, 2^139231572 is an apocalyptic number.

139231572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139231572 is an abundant number, since it is smaller than the sum of its proper divisors (193567020).

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

139231572 is a wasteful number, since it uses less digits than its factorization.

139231572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283039 (or 283037 counting only the distinct ones).

The product of its digits is 11340, while the sum is 33.

The square root of 139231572 is about 11799.6428759518. The cubic root of 139231572 is about 518.2976529537.

The spelling of 139231572 in words is "one hundred thirty-nine million, two hundred thirty-one thousand, five hundred seventy-two".