12615413 has 4 divisors (see below), whose sum is σ = 12923148. Its totient is φ = 12307680.

The previous prime is 12615401. The next prime is 12615437. The reversal of 12615413 is 31451621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31451621 = 89 ⋅353389.

It can be written as a sum of positive squares in 2 ways, for example, as 1170724 + 11444689 = 1082^2 + 3383^2 .

It is a cyclic number.

It is not a de Polignac number, because 12615413 - 2¹⁶ = 12549877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12615313) 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, 153806 + ... + 153887.

It is an arithmetic number, because the mean of its divisors is an integer number (3230787).

Almost surely, 2^12615413 is an apocalyptic number.

It is an amenable number.

12615413 is a deficient number, since it is larger than the sum of its proper divisors (307735).

12615413 is an equidigital number, since it uses as much as digits as its factorization.

12615413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307734.

The product of its digits is 720, while the sum is 23.

The square root of 12615413 is about 3551.8182667473. The cubic root of 12615413 is about 232.7915208608.

The spelling of 12615413 in words is "twelve million, six hundred fifteen thousand, four hundred thirteen".