13281117 has 4 divisors (see below), whose sum is σ = 17708160. Its totient is φ = 8854076.

The previous prime is 13281091. The next prime is 13281157. The reversal of 13281117 is 71118231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13281117 - 2⁶ = 13281053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13281157) 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, 2213517 + ... + 2213522.

It is an arithmetic number, because the mean of its divisors is an integer number (4427040).

Almost surely, 2^13281117 is an apocalyptic number.

It is an amenable number.

13281117 is a deficient number, since it is larger than the sum of its proper divisors (4427043).

13281117 is an equidigital number, since it uses as much as digits as its factorization.

13281117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427042.

The product of its digits is 336, while the sum is 24.

The square root of 13281117 is about 3644.3266867832. The cubic root of 13281117 is about 236.8162687892.

Adding to 13281117 its reverse (71118231), we get a palindrome (84399348).

The spelling of 13281117 in words is "thirteen million, two hundred eighty-one thousand, one hundred seventeen".