12156361 has 6 divisors (see below), whose sum is σ = 14141130. Its totient is φ = 10419696.

The previous prime is 12156359. The next prime is 12156367. The reversal of 12156361 is 16365121.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 866761 = 3360^2 + 931^2 .

It is not a de Polignac number, because 12156361 - 2¹ = 12156359 is a prime.

It is a super-2 number, since 2×12156361² = 295554225524642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12156367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123996 + ... + 124093.

It is an arithmetic number, because the mean of its divisors is an integer number (2356855).

Almost surely, 2^12156361 is an apocalyptic number.

It is an amenable number.

12156361 is a deficient number, since it is larger than the sum of its proper divisors (1984769).

12156361 is an equidigital number, since it uses as much as digits as its factorization.

12156361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248103 (or 248096 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 12156361 is about 3486.5973383802. The cubic root of 12156361 is about 229.9329420134.

The spelling of 12156361 in words is "twelve million, one hundred fifty-six thousand, three hundred sixty-one".