12531413 has 4 divisors (see below), whose sum is σ = 12736908. Its totient is φ = 12325920.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531413 is 31413521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3247204 + 9284209 = 1802^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 12531413 - 2⁶ = 12531349 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 (12531443) 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, 102656 + ... + 102777.

It is an arithmetic number, because the mean of its divisors is an integer number (3184227).

Almost surely, 2^12531413 is an apocalyptic number.

It is an amenable number.

12531413 is a deficient number, since it is larger than the sum of its proper divisors (205495).

12531413 is an equidigital number, since it uses as much as digits as its factorization.

12531413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205494.

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

The square root of 12531413 is about 3539.9735874721. The cubic root of 12531413 is about 232.2736873624.

Adding to 12531413 its reverse (31413521), we get a palindrome (43944934).

The spelling of 12531413 in words is "twelve million, five hundred thirty-one thousand, four hundred thirteen".