13257839 has 16 divisors (see below), whose sum is σ = 16154880. Its totient is φ = 10627200.

The previous prime is 13257833. The next prime is 13257869. The reversal of 13257839 is 93875231.

It is a cyclic number.

It is not a de Polignac number, because 13257839 - 2⁴ = 13257823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13257833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10439 + ... + 11639.

It is an arithmetic number, because the mean of its divisors is an integer number (1009680).

Almost surely, 2^13257839 is an apocalyptic number.

13257839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13257839 is a deficient number, since it is larger than the sum of its proper divisors (2897041).

13257839 is a wasteful number, since it uses less digits than its factorization.

13257839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310.

The product of its digits is 45360, while the sum is 38.

The square root of 13257839 is about 3641.1315548878. The cubic root of 13257839 is about 236.6778308119.

The spelling of 13257839 in words is "thirteen million, two hundred fifty-seven thousand, eight hundred thirty-nine".