8220625 has 20 divisors (see below), whose sum is σ = 11746240. Its totient is φ = 5634000.

The previous prime is 8220581. The next prime is 8220631. The reversal of 8220625 is 5260228.

It is not a de Polignac number, because 8220625 - 2⁷ = 8220497 is a prime.

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

8220625 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8220625.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3436 + ... + 5314.

It is an arithmetic number, because the mean of its divisors is an integer number (587312).

Almost surely, 2^8220625 is an apocalyptic number.

It is an amenable number.

8220625 is a deficient number, since it is larger than the sum of its proper divisors (3525615).

8220625 is an equidigital number, since it uses as much as digits as its factorization.

8220625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906 (or 1891 counting only the distinct ones).

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

The square root of 8220625 is about 2867.1632321861. The cubic root of 8220625 is about 201.8218947688.

The spelling of 8220625 in words is "eight million, two hundred twenty thousand, six hundred twenty-five".