13220925 has 24 divisors (see below), whose sum is σ = 21962880. Its totient is φ = 7017600.

The previous prime is 13220899. The next prime is 13220947. The reversal of 13220925 is 52902231.

It is not a de Polignac number, because 13220925 - 2¹⁰ = 13219901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13220895 and 13220904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30460 + ... + 30890.

It is an arithmetic number, because the mean of its divisors is an integer number (915120).

Almost surely, 2^13220925 is an apocalyptic number.

13220925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13220925 is a deficient number, since it is larger than the sum of its proper divisors (8741955).

13220925 is a wasteful number, since it uses less digits than its factorization.

13220925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 13220925 is about 3636.0589929208. The cubic root of 13220925 is about 236.4579647485.

The spelling of 13220925 in words is "thirteen million, two hundred twenty thousand, nine hundred twenty-five".