13257817 has 2 divisors, whose sum is σ = 13257818. Its totient is φ = 13257816.

The previous prime is 13257793. The next prime is 13257823. The reversal of 13257817 is 71875231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7027801 + 6230016 = 2651^2 + 2496^2 .

It is a cyclic number.

It is not a de Polignac number, because 13257817 - 2⁷ = 13257689 is a prime.

It is not a weakly prime, because it can be changed into another prime (13257017) 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, 6628908 + 6628909.

It is an arithmetic number, because the mean of its divisors is an integer number (6628909).

Almost surely, 2^13257817 is an apocalyptic number.

It is an amenable number.

13257817 is a deficient number, since it is larger than the sum of its proper divisors (1).

13257817 is an equidigital number, since it uses as much as digits as its factorization.

13257817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 13257817 is about 3641.1285338477. The cubic root of 13257817 is about 236.6776998978.

The spelling of 13257817 in words is "thirteen million, two hundred fifty-seven thousand, eight hundred seventeen".