12156072 has 32 divisors (see below), whose sum is σ = 30475680. Its totient is φ = 4040640.

The previous prime is 12156047. The next prime is 12156083. The reversal of 12156072 is 27065121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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, 16218 + ... + 16950.

It is an arithmetic number, because the mean of its divisors is an integer number (952365).

Almost surely, 2^12156072 is an apocalyptic number.

12156072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12156072 is an abundant number, since it is smaller than the sum of its proper divisors (18319608).

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

12156072 is a wasteful number, since it uses less digits than its factorization.

12156072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12156072 is about 3486.5558937152. Note that the first 3 decimals coincide. The cubic root of 12156072 is about 229.9311198906.

The spelling of 12156072 in words is "twelve million, one hundred fifty-six thousand, seventy-two".