12739520 has 56 divisors (see below), whose sum is σ = 31107888. Its totient is φ = 4966400.

The previous prime is 12739513. The next prime is 12739537. The reversal of 12739520 is 2593721.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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, 12635 + ... + 13605.

It is an arithmetic number, because the mean of its divisors is an integer number (555498).

Almost surely, 2^12739520 is an apocalyptic number.

12739520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12739520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15553944).

12739520 is an abundant number, since it is smaller than the sum of its proper divisors (18368368).

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

12739520 is an equidigital number, since it uses as much as digits as its factorization.

12739520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 12739520 is about 3569.2464190638. The cubic root of 12739520 is about 233.5524110227.

The spelling of 12739520 in words is "twelve million, seven hundred thirty-nine thousand, five hundred twenty".