13285891 has 4 divisors (see below), whose sum is σ = 14067432. Its totient is φ = 12504352.

The previous prime is 13285879. The next prime is 13285897. The reversal of 13285891 is 19858231.

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

It is a cyclic number.

It is not a de Polignac number, because 13285891 - 2⁵ = 13285859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13285891.

It is not an unprimeable number, because it can be changed into a prime (13285897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390745 + ... + 390778.

It is an arithmetic number, because the mean of its divisors is an integer number (3516858).

Almost surely, 2^13285891 is an apocalyptic number.

13285891 is a deficient number, since it is larger than the sum of its proper divisors (781541).

13285891 is an equidigital number, since it uses as much as digits as its factorization.

13285891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781540.

The product of its digits is 17280, while the sum is 37.

The square root of 13285891 is about 3644.9816186093. The cubic root of 13285891 is about 236.8446405351.

The spelling of 13285891 in words is "thirteen million, two hundred eighty-five thousand, eight hundred ninety-one".