12513940 has 12 divisors (see below), whose sum is σ = 26279316. Its totient is φ = 5005568.

The previous prime is 12513931. The next prime is 12513953. The reversal of 12513940 is 4931521.

It can be written as a sum of positive squares in 2 ways, for example, as 9960336 + 2553604 = 3156^2 + 1598^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312829 + ... + 312868.

It is an arithmetic number, because the mean of its divisors is an integer number (2189943).

Almost surely, 2^12513940 is an apocalyptic number.

12513940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12513940 is an abundant number, since it is smaller than the sum of its proper divisors (13765376).

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

12513940 is a wasteful number, since it uses less digits than its factorization.

12513940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625706 (or 625704 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12513940 is about 3537.5047703148. The cubic root of 12513940 is about 232.1656812949.

The spelling of 12513940 in words is "twelve million, five hundred thirteen thousand, nine hundred forty".