12856651 has 2 divisors, whose sum is σ = 12856652. Its totient is φ = 12856650.

The previous prime is 12856643. The next prime is 12856667. The reversal of 12856651 is 15665821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15665821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12856651 - 2³ = 12856643 is a prime.

It is not a weakly prime, because it can be changed into another prime (12856601) 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, 6428325 + 6428326.

It is an arithmetic number, because the mean of its divisors is an integer number (6428326).

Almost surely, 2^12856651 is an apocalyptic number.

12856651 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856651 is an equidigital number, since it uses as much as digits as its factorization.

12856651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 12856651 is about 3585.6172411455. The cubic root of 12856651 is about 234.2660122841.

The spelling of 12856651 in words is "twelve million, eight hundred fifty-six thousand, six hundred fifty-one".