12156227 has 4 divisors (see below), whose sum is σ = 12163296. Its totient is φ = 12149160.

The previous prime is 12156217. The next prime is 12156233. The reversal of 12156227 is 72265121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12156227 - 2⁴ = 12156211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12156196 and 12156205.

It is not an unprimeable number, because it can be changed into a prime (12156217) 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, 902 + ... + 5012.

It is an arithmetic number, because the mean of its divisors is an integer number (3040824).

Almost surely, 2^12156227 is an apocalyptic number.

12156227 is a deficient number, since it is larger than the sum of its proper divisors (7069).

12156227 is an equidigital number, since it uses as much as digits as its factorization.

12156227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7068.

The product of its digits is 1680, while the sum is 26.

The square root of 12156227 is about 3486.5781218840. The cubic root of 12156227 is about 229.9320971573.

The spelling of 12156227 in words is "twelve million, one hundred fifty-six thousand, two hundred twenty-seven".