12156320 has 48 divisors (see below), whose sum is σ = 31334688. Its totient is φ = 4419840.

The previous prime is 12156317. The next prime is 12156323. The reversal of 12156320 is 2365121.

It is an interprime number because it is at equal distance from previous prime (12156317) and next prime (12156323).

It is a super-2 number, since 2×12156320² = 295552231884800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12156292 and 12156301.

It is not an unprimeable number, because it can be changed into a prime (12156323) 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 7 ways as a sum of consecutive naturals, for example, 1694 + ... + 5213.

It is an arithmetic number, because the mean of its divisors is an integer number (652806).

Almost surely, 2^12156320 is an apocalyptic number.

12156320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12156320 is an abundant number, since it is smaller than the sum of its proper divisors (19178368).

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

12156320 is a wasteful number, since it uses less digits than its factorization.

12156320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933 (or 6925 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12156320 is about 3486.5914587172. The cubic root of 12156320 is about 229.9326835133.

The spelling of 12156320 in words is "twelve million, one hundred fifty-six thousand, three hundred twenty".