13115812 has 12 divisors (see below), whose sum is σ = 23011660. Its totient is φ = 6541056.

The previous prime is 13115783. The next prime is 13115813. The reversal of 13115812 is 21851131.

It can be written as a sum of positive squares in 2 ways, for example, as 10074276 + 3041536 = 3174^2 + 1744^2 .

It is not an unprimeable number, because it can be changed into a prime (13115813) 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, 2373 + ... + 5644.

Almost surely, 2^13115812 is an apocalyptic number.

It is an amenable number.

13115812 is a deficient number, since it is larger than the sum of its proper divisors (9895848).

13115812 is a wasteful number, since it uses less digits than its factorization.

13115812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430 (or 8428 counting only the distinct ones).

The product of its digits is 240, while the sum is 22.

The square root of 13115812 is about 3621.5759000744. The cubic root of 13115812 is about 235.8296434084.

Adding to 13115812 its reverse (21851131), we get a palindrome (34966943).

The spelling of 13115812 in words is "thirteen million, one hundred fifteen thousand, eight hundred twelve".