12513631 has 4 divisors (see below), whose sum is σ = 13476232. Its totient is φ = 11551032.

The previous prime is 12513629. The next prime is 12513643. The reversal of 12513631 is 13631521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13631521 = 719 ⋅18959.

It is a cyclic number.

It is not a de Polignac number, because 12513631 - 2¹ = 12513629 is a prime.

It is a super-2 number, since 2×12513631² = 313181921608322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481281 + ... + 481306.

It is an arithmetic number, because the mean of its divisors is an integer number (3369058).

Almost surely, 2^12513631 is an apocalyptic number.

12513631 is a deficient number, since it is larger than the sum of its proper divisors (962601).

12513631 is an equidigital number, since it uses as much as digits as its factorization.

12513631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962600.

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

The square root of 12513631 is about 3537.4610951924. The cubic root of 12513631 is about 232.1637703650.

The spelling of 12513631 in words is "twelve million, five hundred thirteen thousand, six hundred thirty-one".