13525489 has 8 divisors (see below), whose sum is σ = 14375880. Its totient is φ = 12725248.

The previous prime is 13525487. The next prime is 13525493. The reversal of 13525489 is 98452531.

It can be written as a sum of positive squares in 4 ways, for example, as 5640625 + 7884864 = 2375^2 + 2808^2 .

It is not a de Polignac number, because 13525489 - 2¹ = 13525487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13525481) 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 7 ways as a sum of consecutive naturals, for example, 3537 + ... + 6289.

It is an arithmetic number, because the mean of its divisors is an integer number (1796985).

Almost surely, 2^13525489 is an apocalyptic number.

It is an amenable number.

13525489 is a deficient number, since it is larger than the sum of its proper divisors (850391).

13525489 is an frugal number, since it uses more digits than its factorization.

13525489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2770 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 13525489 is about 3677.7015920273. The cubic root of 13525489 is about 238.2599201192.

The spelling of 13525489 in words is "thirteen million, five hundred twenty-five thousand, four hundred eighty-nine".