13281491 has 4 divisors (see below), whose sum is σ = 13288800. Its totient is φ = 13274184.

The previous prime is 13281461. The next prime is 13281493. The reversal of 13281491 is 19418231.

13281491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13281491 - 2⁶ = 13281427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13281493) 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, 1430 + ... + 5348.

It is an arithmetic number, because the mean of its divisors is an integer number (3322200).

Almost surely, 2^13281491 is an apocalyptic number.

13281491 is a deficient number, since it is larger than the sum of its proper divisors (7309).

13281491 is an equidigital number, since it uses as much as digits as its factorization.

13281491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7308.

The product of its digits is 1728, while the sum is 29.

The square root of 13281491 is about 3644.3779990555. The cubic root of 13281491 is about 236.8184917060.

The spelling of 13281491 in words is "thirteen million, two hundred eighty-one thousand, four hundred ninety-one".