12156232 has 16 divisors (see below), whose sum is σ = 24865200. Its totient is φ = 5525520.

The previous prime is 12156217. The next prime is 12156233. The reversal of 12156232 is 23265121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12156233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68982 + ... + 69157.

It is an arithmetic number, because the mean of its divisors is an integer number (1554075).

Almost surely, 2^12156232 is an apocalyptic number.

It is an amenable number.

12156232 is an abundant number, since it is smaller than the sum of its proper divisors (12708968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12156232 is a wasteful number, since it uses less digits than its factorization.

12156232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138156 (or 138152 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 12156232 is about 3486.5788389193. The cubic root of 12156232 is about 229.9321286819.

Subtracting 12156232 from its reverse (23265121), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 1215 and 6232, that added together give a palindrome (7447).

The spelling of 12156232 in words is "twelve million, one hundred fifty-six thousand, two hundred thirty-two".