13253439 has 4 divisors (see below), whose sum is σ = 17671256. Its totient is φ = 8835624.

The previous prime is 13253423. The next prime is 13253441. The reversal of 13253439 is 93435231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13253439 - 2⁴ = 13253423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13253459) 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, 2208904 + ... + 2208909.

It is an arithmetic number, because the mean of its divisors is an integer number (4417814).

Almost surely, 2^13253439 is an apocalyptic number.

13253439 is a deficient number, since it is larger than the sum of its proper divisors (4417817).

13253439 is an equidigital number, since it uses as much as digits as its factorization.

13253439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417816.

The product of its digits is 9720, while the sum is 30.

The square root of 13253439 is about 3640.5272969722. The cubic root of 13253439 is about 236.6516451045.

The spelling of 13253439 in words is "thirteen million, two hundred fifty-three thousand, four hundred thirty-nine".