12156155 has 8 divisors (see below), whose sum is σ = 15913584. Its totient is φ = 8840800.

The previous prime is 12156149. The next prime is 12156161. The reversal of 12156155 is 55165121.

It is an interprime number because it is at equal distance from previous prime (12156149) and next prime (12156161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12156155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110456 + ... + 110565.

It is an arithmetic number, because the mean of its divisors is an integer number (1989198).

Almost surely, 2^12156155 is an apocalyptic number.

12156155 is a deficient number, since it is larger than the sum of its proper divisors (3757429).

12156155 is a wasteful number, since it uses less digits than its factorization.

12156155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221037.

The product of its digits is 1500, while the sum is 26.

The square root of 12156155 is about 3486.5677965587. The cubic root of 12156155 is about 229.9316432022.

The spelling of 12156155 in words is "twelve million, one hundred fifty-six thousand, one hundred fifty-five".