12156049 has 4 divisors (see below), whose sum is σ = 12452580. Its totient is φ = 11859520.

The previous prime is 12156047. The next prime is 12156083. The reversal of 12156049 is 94065121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1476225 + 10679824 = 1215^2 + 3268^2 .

It is a cyclic number.

It is not a de Polignac number, because 12156049 - 2¹ = 12156047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12156043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148204 + ... + 148285.

It is an arithmetic number, because the mean of its divisors is an integer number (3113145).

Almost surely, 2^12156049 is an apocalyptic number.

It is an amenable number.

12156049 is a deficient number, since it is larger than the sum of its proper divisors (296531).

12156049 is an equidigital number, since it uses as much as digits as its factorization.

12156049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296530.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12156049 is about 3486.5525953297. The cubic root of 12156049 is about 229.9309748762.

The spelling of 12156049 in words is "twelve million, one hundred fifty-six thousand, forty-nine".