12656239 has 2 divisors, whose sum is σ = 12656240. Its totient is φ = 12656238.

The previous prime is 12656227. The next prime is 12656243. The reversal of 12656239 is 93265621.

12656239 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 is a cyclic number.

It is not a de Polignac number, because 12656239 - 2¹³ = 12648047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12656639) 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 as a sum of consecutive naturals, namely, 6328119 + 6328120.

It is an arithmetic number, because the mean of its divisors is an integer number (6328120).

Almost surely, 2^12656239 is an apocalyptic number.

12656239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656239 is an equidigital number, since it uses as much as digits as its factorization.

12656239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 12656239 is about 3557.5608216867. The cubic root of 12656239 is about 233.0423704313.

It can be divided in two parts, 126 and 56239, that added together give a palindrome (56365).

The spelling of 12656239 in words is "twelve million, six hundred fifty-six thousand, two hundred thirty-nine".