12156120 has 48 divisors (see below), whose sum is σ = 39508560. Its totient is φ = 3241536.

The previous prime is 12156119. The next prime is 12156149. The reversal of 12156120 is 2165121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12156093 and 12156102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16524 + ... + 17243.

It is an arithmetic number, because the mean of its divisors is an integer number (823095).

Almost surely, 2^12156120 is an apocalyptic number.

12156120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12156120 is an abundant number, since it is smaller than the sum of its proper divisors (27352440).

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

12156120 is a wasteful number, since it uses less digits than its factorization.

12156120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33784 (or 33777 counting only the distinct ones).

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

The square root of 12156120 is about 3486.5627772923. The cubic root of 12156120 is about 229.9314225289.

Subtracting from 12156120 its reverse (2165121), we obtain a palindrome (9990999).

The spelling of 12156120 in words is "twelve million, one hundred fifty-six thousand, one hundred twenty".