12156863 has 4 divisors (see below), whose sum is σ = 12198648. Its totient is φ = 12115080.

The previous prime is 12156847. The next prime is 12156899. The reversal of 12156863 is 36865121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12156863 - 2⁴ = 12156847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20453 + ... + 21038.

It is an arithmetic number, because the mean of its divisors is an integer number (3049662).

Almost surely, 2^12156863 is an apocalyptic number.

12156863 is a deficient number, since it is larger than the sum of its proper divisors (41785).

12156863 is an equidigital number, since it uses as much as digits as its factorization.

12156863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41784.

The product of its digits is 8640, while the sum is 32.

The square root of 12156863 is about 3486.6693275962. The cubic root of 12156863 is about 229.9361070162.

The spelling of 12156863 in words is "twelve million, one hundred fifty-six thousand, eight hundred sixty-three".