13251009 has 16 divisors (see below), whose sum is σ = 18233600. Its totient is φ = 8554896.

The previous prime is 13251001. The next prime is 13251019. The reversal of 13251009 is 90015231.

It is not a de Polignac number, because 13251009 - 2³ = 13251001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13251001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17562 + ... + 18300.

It is an arithmetic number, because the mean of its divisors is an integer number (1139600).

Almost surely, 2^13251009 is an apocalyptic number.

It is an amenable number.

13251009 is a deficient number, since it is larger than the sum of its proper divisors (4982591).

13251009 is a wasteful number, since it uses less digits than its factorization.

13251009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 13251009 is about 3640.1935388108. The cubic root of 13251009 is about 236.6371809681.

The spelling of 13251009 in words is "thirteen million, two hundred fifty-one thousand, nine".