12815157 has 16 divisors (see below), whose sum is σ = 17538560. Its totient is φ = 8320752.

The previous prime is 12815149. The next prime is 12815167. The reversal of 12815157 is 75151821.

12815157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12815157 - 2³ = 12815149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12815107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20394 + ... + 21012.

It is an arithmetic number, because the mean of its divisors is an integer number (1096160).

Almost surely, 2^12815157 is an apocalyptic number.

It is an amenable number.

12815157 is a deficient number, since it is larger than the sum of its proper divisors (4723403).

12815157 is a wasteful number, since it uses less digits than its factorization.

12815157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its digits is 2800, while the sum is 30.

The square root of 12815157 is about 3579.8263924386. The cubic root of 12815157 is about 234.0137145881.

Adding to 12815157 its reverse (75151821), we get a palindrome (87966978).

The spelling of 12815157 in words is "twelve million, eight hundred fifteen thousand, one hundred fifty-seven".