12939520 has 72 divisors (see below), whose sum is σ = 33848640. Its totient is φ = 4700160.

The previous prime is 12939491. The next prime is 12939541. The reversal of 12939520 is 2593921.

12939520 = T₄₂₉ + T₄₃₀ + ... + T₅₃₈.

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, 13621 + ... + 14539.

It is an arithmetic number, because the mean of its divisors is an integer number (470120).

Almost surely, 2^12939520 is an apocalyptic number.

12939520 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 12939520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16924320).

12939520 is an abundant number, since it is smaller than the sum of its proper divisors (20909120).

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

12939520 is an equidigital number, since it uses as much as digits as its factorization.

12939520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 12939520 is about 3597.1544309357. The cubic root of 12939520 is about 234.7682640885.

The spelling of 12939520 in words is "twelve million, nine hundred thirty-nine thousand, five hundred twenty".