12392157 has 16 divisors (see below), whose sum is σ = 17160192. Its totient is φ = 7946160.

The previous prime is 12392143. The next prime is 12392173. The reversal of 12392157 is 75129321.

It is not a de Polignac number, because 12392157 - 2¹⁴ = 12375773 is a prime.

It is a super-2 number, since 2×12392157² = 307131110225298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12392137) 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, 20818 + ... + 21404.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^12392157 is an apocalyptic number.

It is an amenable number.

12392157 is a deficient number, since it is larger than the sum of its proper divisors (4768035).

12392157 is a wasteful number, since it uses less digits than its factorization.

12392157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 3780, while the sum is 30.

The square root of 12392157 is about 3520.2495650167. The cubic root of 12392157 is about 231.4100959079.

The spelling of 12392157 in words is "twelve million, three hundred ninety-two thousand, one hundred fifty-seven".