13256819 has 2 divisors, whose sum is σ = 13256820. Its totient is φ = 13256818.

The previous prime is 13256801. The next prime is 13256827. The reversal of 13256819 is 91865231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13256819 - 2⁸ = 13256563 is a prime.

It is a super-2 number, since 2×13256819² = 351486499997522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13256839) 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, 6628409 + 6628410.

It is an arithmetic number, because the mean of its divisors is an integer number (6628410).

Almost surely, 2^13256819 is an apocalyptic number.

13256819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13256819 is an equidigital number, since it uses as much as digits as its factorization.

13256819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 13256819 is about 3640.9914858456. The cubic root of 13256819 is about 236.6717610048.

The spelling of 13256819 in words is "thirteen million, two hundred fifty-six thousand, eight hundred nineteen".