13257489 has 12 divisors (see below), whose sum is σ = 20562864. Its totient is φ = 7575624.

The previous prime is 13257469. The next prime is 13257493. The reversal of 13257489 is 98475231.

It is not a de Polignac number, because 13257489 - 2¹⁶ = 13191953 is a prime.

It is a super-2 number, since 2×13257489² = 351522029170242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13257469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44947 + ... + 45240.

It is an arithmetic number, because the mean of its divisors is an integer number (1713572).

Almost surely, 2^13257489 is an apocalyptic number.

It is an amenable number.

13257489 is a deficient number, since it is larger than the sum of its proper divisors (7305375).

13257489 is an equidigital number, since it uses as much as digits as its factorization.

13257489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90204 (or 90197 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 13257489 is about 3641.0834925884. The cubic root of 13257489 is about 236.6757480700.

The spelling of 13257489 in words is "thirteen million, two hundred fifty-seven thousand, four hundred eighty-nine".