13091257 has 4 divisors (see below), whose sum is σ = 13127296. Its totient is φ = 13055220.

The previous prime is 13091251. The next prime is 13091261. The reversal of 13091257 is 75219031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13091257 - 2³ = 13091249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13091251) 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 3 ways as a sum of consecutive naturals, for example, 17469 + ... + 18202.

It is an arithmetic number, because the mean of its divisors is an integer number (3281824).

Almost surely, 2^13091257 is an apocalyptic number.

It is an amenable number.

13091257 is a deficient number, since it is larger than the sum of its proper divisors (36039).

13091257 is an equidigital number, since it uses as much as digits as its factorization.

13091257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36038.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 13091257 is about 3618.1842131102. The cubic root of 13091257 is about 235.6823805870.

The spelling of 13091257 in words is "thirteen million, ninety-one thousand, two hundred fifty-seven".