12613520 has 20 divisors (see below), whose sum is σ = 29326620. Its totient is φ = 5045376.

The previous prime is 12613501. The next prime is 12613547. The reversal of 12613520 is 2531621.

It can be written as a sum of positive squares in 2 ways, for example, as 3444736 + 9168784 = 1856^2 + 3028^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12613492 and 12613501.

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, 78755 + ... + 78914.

It is an arithmetic number, because the mean of its divisors is an integer number (1466331).

Almost surely, 2^12613520 is an apocalyptic number.

12613520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12613520 is an abundant number, since it is smaller than the sum of its proper divisors (16713100).

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

12613520 is a wasteful number, since it uses less digits than its factorization.

12613520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157682 (or 157676 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12613520 is about 3551.5517735210. The cubic root of 12613520 is about 232.7798764701.

The spelling of 12613520 in words is "twelve million, six hundred thirteen thousand, five hundred twenty".