12156157 has 6 divisors (see below), whose sum is σ = 13104798. Its totient is φ = 11209464.

The previous prime is 12156149. The next prime is 12156161. The reversal of 12156157 is 75165121.

It can be written as a sum of positive squares in only one way, i.e., 8415801 + 3740356 = 2901^2 + 1934^2 .

It is not a de Polignac number, because 12156157 - 2³ = 12156149 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 (12156107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12088 + ... + 13054.

It is an arithmetic number, because the mean of its divisors is an integer number (2184133).

Almost surely, 2^12156157 is an apocalyptic number.

It is an amenable number.

12156157 is a deficient number, since it is larger than the sum of its proper divisors (948641).

12156157 is an frugal number, since it uses more digits than its factorization.

12156157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 980 counting only the distinct ones).

The product of its digits is 2100, while the sum is 28.

The square root of 12156157 is about 3486.5680833737. The cubic root of 12156157 is about 229.9316558121.

The spelling of 12156157 in words is "twelve million, one hundred fifty-six thousand, one hundred fifty-seven".