12356881 has 2 divisors, whose sum is σ = 12356882. Its totient is φ = 12356880.

The previous prime is 12356863. The next prime is 12356887. The reversal of 12356881 is 18865321.

12356881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 5803281 = 2560^2 + 2409^2 .

It is an emirp because it is prime and its reverse (18865321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12356881 - 2⁷ = 12356753 is a prime.

It is a super-2 number, since 2×12356881² = 305385016096322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12356887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6178440 + 6178441.

It is an arithmetic number, because the mean of its divisors is an integer number (6178441).

Almost surely, 2^12356881 is an apocalyptic number.

It is an amenable number.

12356881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12356881 is an equidigital number, since it uses as much as digits as its factorization.

12356881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 12356881 is about 3515.2355539850. The cubic root of 12356881 is about 231.1903068716.

The spelling of 12356881 in words is "twelve million, three hundred fifty-six thousand, eight hundred eighty-one".