12156413 has 4 divisors (see below), whose sum is σ = 12337920. Its totient is φ = 11974908.

The previous prime is 12156383. The next prime is 12156439. The reversal of 12156413 is 31465121.

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 12156413 - 2¹⁰ = 12155389 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 (12156013) 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, 90653 + ... + 90786.

It is an arithmetic number, because the mean of its divisors is an integer number (3084480).

Almost surely, 2^12156413 is an apocalyptic number.

It is an amenable number.

12156413 is a deficient number, since it is larger than the sum of its proper divisors (181507).

12156413 is an equidigital number, since it uses as much as digits as its factorization.

12156413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181506.

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

The square root of 12156413 is about 3486.6047954995. The cubic root of 12156413 is about 229.9332698663.

The spelling of 12156413 in words is "twelve million, one hundred fifty-six thousand, four hundred thirteen".