12513557 has 4 divisors (see below), whose sum is σ = 14301216. Its totient is φ = 10725900.

The previous prime is 12513517. The next prime is 12513563. The reversal of 12513557 is 75531521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12513557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893819 + ... + 893832.

It is an arithmetic number, because the mean of its divisors is an integer number (3575304).

Almost surely, 2^12513557 is an apocalyptic number.

It is an amenable number.

12513557 is a deficient number, since it is larger than the sum of its proper divisors (1787659).

12513557 is an equidigital number, since it uses as much as digits as its factorization.

12513557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787658.

The product of its digits is 5250, while the sum is 29.

The square root of 12513557 is about 3537.4506356980. The cubic root of 12513557 is about 232.1633127266.

The spelling of 12513557 in words is "twelve million, five hundred thirteen thousand, five hundred fifty-seven".