12156 has 12 divisors (see below), whose sum is σ = 28392. Its totient is φ = 4048.

The previous prime is 12149. The next prime is 12157. The reversal of 12156 is 65121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 12156.

It is not an unprimeable number, because it can be changed into a prime (12157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495 + ... + 518.

It is an arithmetic number, because the mean of its divisors is an integer number (2366).

2¹²¹⁵⁶ is an apocalyptic number.

It is an amenable number.

12156 is an abundant number, since it is smaller than the sum of its proper divisors (16236).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14196).

12156 is a wasteful number, since it uses less digits than its factorization.

12156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1018 counting only the distinct ones).

The product of its digits is 60, while the sum is 15.

The square root of 12156 is about 110.2542516187. The cubic root of 12156 is about 22.9930665932.

Adding to 12156 its reverse (65121), we get a palindrome (77277).

It can be divided in two parts, 1215 and 6, that added together give a palindrome (1221).

The spelling of 12156 in words is "twelve thousand, one hundred fifty-six".