13291225 has 12 divisors (see below), whose sum is σ = 16762320. Its totient is φ = 10451600.

The previous prime is 13291199. The next prime is 13291237. The reversal of 13291225 is 52219231.

It is a happy number.

It is not a de Polignac number, because 13291225 - 2⁹ = 13290713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 13291225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3031 + ... + 5980.

It is an arithmetic number, because the mean of its divisors is an integer number (1396860).

Almost surely, 2^13291225 is an apocalyptic number.

It is an amenable number.

13291225 is a deficient number, since it is larger than the sum of its proper divisors (3471095).

13291225 is an equidigital number, since it uses as much as digits as its factorization.

13291225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9080 (or 9075 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 13291225 is about 3645.7132361172. The cubic root of 13291225 is about 236.8763323071.

The spelling of 13291225 in words is "thirteen million, two hundred ninety-one thousand, two hundred twenty-five".