12915313 has 4 divisors (see below), whose sum is σ = 13331968. Its totient is φ = 12498660.

The previous prime is 12915311. The next prime is 12915317. The reversal of 12915313 is 31351921.

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 not a de Polignac number, because 12915313 - 2¹ = 12915311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12915311) 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, 208281 + ... + 208342.

It is an arithmetic number, because the mean of its divisors is an integer number (3332992).

Almost surely, 2^12915313 is an apocalyptic number.

It is an amenable number.

12915313 is a deficient number, since it is larger than the sum of its proper divisors (416655).

12915313 is an equidigital number, since it uses as much as digits as its factorization.

12915313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416654.

The product of its digits is 810, while the sum is 25.

The square root of 12915313 is about 3593.7881128414. The cubic root of 12915313 is about 234.6217727462.

The spelling of 12915313 in words is "twelve million, nine hundred fifteen thousand, three hundred thirteen".