13220845 has 8 divisors (see below), whose sum is σ = 17307360. Its totient is φ = 9615120.

The previous prime is 13220843. The next prime is 13220863. The reversal of 13220845 is 54802231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13220845 - 2¹ = 13220843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120135 + ... + 120244.

It is an arithmetic number, because the mean of its divisors is an integer number (2163420).

Almost surely, 2^13220845 is an apocalyptic number.

It is an amenable number.

13220845 is a deficient number, since it is larger than the sum of its proper divisors (4086515).

13220845 is a wasteful number, since it uses less digits than its factorization.

13220845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240395.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 13220845 is about 3636.0479919825. The cubic root of 13220845 is about 236.4574878107.

The spelling of 13220845 in words is "thirteen million, two hundred twenty thousand, eight hundred forty-five".