12156955 has 16 divisors (see below), whose sum is σ = 15629760. Its totient is φ = 9044992.

The previous prime is 12156899. The next prime is 12156983. The reversal of 12156955 is 55965121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12156955 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12156955.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6762 + ... + 8368.

It is an arithmetic number, because the mean of its divisors is an integer number (976860).

Almost surely, 2^12156955 is an apocalyptic number.

12156955 is a deficient number, since it is larger than the sum of its proper divisors (3472805).

12156955 is a wasteful number, since it uses less digits than its factorization.

12156955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its digits is 13500, while the sum is 34.

The square root of 12156955 is about 3486.6825206778. The cubic root of 12156955 is about 229.9366870471.

The spelling of 12156955 in words is "twelve million, one hundred fifty-six thousand, nine hundred fifty-five".