12864739 has 2 divisors, whose sum is σ = 12864740. Its totient is φ = 12864738.

The previous prime is 12864707. The next prime is 12864749. The reversal of 12864739 is 93746821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12864739 - 2⁵ = 12864707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12864749) 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, 6432369 + 6432370.

It is an arithmetic number, because the mean of its divisors is an integer number (6432370).

Almost surely, 2^12864739 is an apocalyptic number.

12864739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12864739 is an equidigital number, since it uses as much as digits as its factorization.

12864739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 12864739 is about 3586.7449031120. The cubic root of 12864739 is about 234.3151268454.

The spelling of 12864739 in words is "twelve million, eight hundred sixty-four thousand, seven hundred thirty-nine".