12165156 has 36 divisors (see below), whose sum is σ = 31585372. Its totient is φ = 3945024.

The previous prime is 12165133. The next prime is 12165161. The reversal of 12165156 is 65156121.

It is a happy number.

12165156 is a `hidden beast` number, since 1 + 2 + 1 + 651 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10342656 + 1822500 = 3216^2 + 1350^2 .

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

It is a super-3 number, since 3×12165156³ (a number of 22 digits) contains 333 as substring.

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, 3235 + ... + 5898.

Almost surely, 2^12165156 is an apocalyptic number.

It is an amenable number.

12165156 is an abundant number, since it is smaller than the sum of its proper divisors (19420216).

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

12165156 is a wasteful number, since it uses less digits than its factorization.

12165156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9180 (or 9175 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 12165156 is about 3487.8583686841. The cubic root of 12165156 is about 229.9883800053.

It can be divided in two parts, 12165 and 156, that added together give a palindrome (12321).

The spelling of 12165156 in words is "twelve million, one hundred sixty-five thousand, one hundred fifty-six".