12785867 has 2 divisors, whose sum is σ = 12785868. Its totient is φ = 12785866.

The previous prime is 12785863. The next prime is 12785869. The reversal of 12785867 is 76858721.

It is a strong prime.

It is an emirp because it is prime and its reverse (76858721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12785867 - 2² = 12785863 is a prime.

Together with 12785869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12785863) 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, 6392933 + 6392934.

It is an arithmetic number, because the mean of its divisors is an integer number (6392934).

Almost surely, 2^12785867 is an apocalyptic number.

12785867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12785867 is an equidigital number, since it uses as much as digits as its factorization.

12785867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 44.

The square root of 12785867 is about 3575.7330716931. The cubic root of 12785867 is about 233.8352933037.

The spelling of 12785867 in words is "twelve million, seven hundred eighty-five thousand, eight hundred sixty-seven".