12156012 has 36 divisors (see below), whose sum is σ = 33522216. Its totient is φ = 3683520.

The previous prime is 12155993. The next prime is 12156013. The reversal of 12156012 is 21065121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12156013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14953 + ... + 15744.

Almost surely, 2^12156012 is an apocalyptic number.

12156012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12156012 is an abundant number, since it is smaller than the sum of its proper divisors (21366204).

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

12156012 is a wasteful number, since it uses less digits than its factorization.

12156012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30718 (or 30713 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12156012 is about 3486.5472892247. The cubic root of 12156012 is about 229.9307415916.

It can be divided in two parts, 1215 and 6012, that added together give a palindrome (7227).

The spelling of 12156012 in words is "twelve million, one hundred fifty-six thousand, twelve".