13257249 has 4 divisors (see below), whose sum is σ = 17676336. Its totient is φ = 8838164.

The previous prime is 13257221. The next prime is 13257253. The reversal of 13257249 is 94275231.

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 13257249 - 2⁷ = 13257121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13257259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2209539 + ... + 2209544.

It is an arithmetic number, because the mean of its divisors is an integer number (4419084).

Almost surely, 2^13257249 is an apocalyptic number.

It is an amenable number.

13257249 is a deficient number, since it is larger than the sum of its proper divisors (4419087).

13257249 is an equidigital number, since it uses as much as digits as its factorization.

13257249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419086.

The product of its digits is 15120, while the sum is 33.

The square root of 13257249 is about 3641.0505352165. The cubic root of 13257249 is about 236.6743198830.

The spelling of 13257249 in words is "thirteen million, two hundred fifty-seven thousand, two hundred forty-nine".