12631513 has 4 divisors (see below), whose sum is σ = 12638628. Its totient is φ = 12624400.

The previous prime is 12631511. The next prime is 12631517. The reversal of 12631513 is 31513621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9048064 + 3583449 = 3008^2 + 1893^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631513 - 2¹ = 12631511 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12631511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563 + ... + 5263.

It is an arithmetic number, because the mean of its divisors is an integer number (3159657).

Almost surely, 2^12631513 is an apocalyptic number.

It is an amenable number.

12631513 is a deficient number, since it is larger than the sum of its proper divisors (7115).

12631513 is an equidigital number, since it uses as much as digits as its factorization.

12631513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7114.

The product of its digits is 540, while the sum is 22.

The square root of 12631513 is about 3554.0839888781. The cubic root of 12631513 is about 232.8905095667.

The spelling of 12631513 in words is "twelve million, six hundred thirty-one thousand, five hundred thirteen".