12158157 has 16 divisors (see below), whose sum is σ = 18616320. Its totient is φ = 6980400.

The previous prime is 12158149. The next prime is 12158161. The reversal of 12158157 is 75185121.

12158157 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12158157 - 2³ = 12158149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12158117) 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, 9069 + ... + 10322.

It is an arithmetic number, because the mean of its divisors is an integer number (1163520).

Almost surely, 2^12158157 is an apocalyptic number.

It is an amenable number.

12158157 is a deficient number, since it is larger than the sum of its proper divisors (6458163).

12158157 is a wasteful number, since it uses less digits than its factorization.

12158157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19424.

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

The square root of 12158157 is about 3486.8548865704. The cubic root of 12158157 is about 229.9442650080.

The spelling of 12158157 in words is "twelve million, one hundred fifty-eight thousand, one hundred fifty-seven".