13157812 has 12 divisors (see below), whose sum is σ = 23342116. Its totient is φ = 6488640.

The previous prime is 13157803. The next prime is 13157819. The reversal of 13157812 is 21875131.

It can be written as a sum of positive squares in 2 ways, for example, as 10074276 + 3083536 = 3174^2 + 1756^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22239 + ... + 22822.

Almost surely, 2^13157812 is an apocalyptic number.

It is an amenable number.

13157812 is a deficient number, since it is larger than the sum of its proper divisors (10184304).

13157812 is a wasteful number, since it uses less digits than its factorization.

13157812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45138 (or 45136 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 13157812 is about 3627.3698460455. The cubic root of 13157812 is about 236.0811030263.

The spelling of 13157812 in words is "thirteen million, one hundred fifty-seven thousand, eight hundred twelve".