13220425 has 12 divisors (see below), whose sum is σ = 16673040. Its totient is φ = 10395920.

The previous prime is 13220419. The next prime is 13220437. The reversal of 13220425 is 52402231.

13220425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-13220425 is a prime.

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, 3007 + ... + 5956.

It is an arithmetic number, because the mean of its divisors is an integer number (1389420).

Almost surely, 2^13220425 is an apocalyptic number.

It is an amenable number.

13220425 is a deficient number, since it is larger than the sum of its proper divisors (3452615).

13220425 is an equidigital number, since it uses as much as digits as its factorization.

13220425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 13220425 is about 3635.9902365105. The cubic root of 13220425 is about 236.4549838559.

Adding to 13220425 its reverse (52402231), we get a palindrome (65622656).

The spelling of 13220425 in words is "thirteen million, two hundred twenty thousand, four hundred twenty-five".