12161156 has 24 divisors (see below), whose sum is σ = 24842496. Its totient is φ = 5100480.

The previous prime is 12161153. The next prime is 12161167. The reversal of 12161156 is 65116121.

It is not an unprimeable number, because it can be changed into a prime (12161153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3305 + ... + 5936.

It is an arithmetic number, because the mean of its divisors is an integer number (1035104).

Almost surely, 2^12161156 is an apocalyptic number.

It is an amenable number.

12161156 is an abundant number, since it is smaller than the sum of its proper divisors (12681340).

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

12161156 is a wasteful number, since it uses less digits than its factorization.

12161156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9299 (or 9297 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 12161156 is about 3487.2849037611. The cubic root of 12161156 is about 229.9631699061.

Adding to 12161156 its reverse (65116121), we get a palindrome (77277277).

It can be divided in two parts, 1216115 and 6, that added together give a palindrome (1216121).

The spelling of 12161156 in words is "twelve million, one hundred sixty-one thousand, one hundred fifty-six".