12813237 has 12 divisors (see below), whose sum is σ = 18591820. Its totient is φ = 8503488.

The previous prime is 12813217. The next prime is 12813253. The reversal of 12813237 is 73231821.

12813237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 1962801 = 3294^2 + 1401^2 .

It is not a de Polignac number, because 12813237 - 2⁶ = 12813173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12813237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12813217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1048 + ... + 5169.

Almost surely, 2^12813237 is an apocalyptic number.

It is an amenable number.

12813237 is a deficient number, since it is larger than the sum of its proper divisors (5778583).

12813237 is a wasteful number, since it uses less digits than its factorization.

12813237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 6449 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12813237 is about 3579.5582129643. The cubic root of 12813237 is about 234.0020271575.

The spelling of 12813237 in words is "twelve million, eight hundred thirteen thousand, two hundred thirty-seven".