13149257 has 4 divisors (see below), whose sum is σ = 14344656. Its totient is φ = 11953860.

The previous prime is 13149229. The next prime is 13149263. The reversal of 13149257 is 75294131.

13149257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13149257 - 2⁶ = 13149193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13149277) 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, 597683 + ... + 597704.

It is an arithmetic number, because the mean of its divisors is an integer number (3586164).

Almost surely, 2^13149257 is an apocalyptic number.

It is an amenable number.

13149257 is a deficient number, since it is larger than the sum of its proper divisors (1195399).

13149257 is a wasteful number, since it uses less digits than its factorization.

13149257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195398.

The product of its digits is 7560, while the sum is 32.

The square root of 13149257 is about 3626.1904252259. The cubic root of 13149257 is about 236.0299265410.

The spelling of 13149257 in words is "thirteen million, one hundred forty-nine thousand, two hundred fifty-seven".