8120225 has 6 divisors (see below), whose sum is σ = 10069110. Its totient is φ = 6496160.

The previous prime is 8120213. The next prime is 8120243. The reversal of 8120225 is 5220218.

It can be written as a sum of positive squares in 3 ways, for example, as 1002001 + 7118224 = 1001^2 + 2668^2 .

It is not a de Polignac number, because 8120225 - 2⁴ = 8120209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8120197 and 8120206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162380 + ... + 162429.

It is an arithmetic number, because the mean of its divisors is an integer number (1678185).

Almost surely, 2^8120225 is an apocalyptic number.

It is an amenable number.

8120225 is a deficient number, since it is larger than the sum of its proper divisors (1948885).

8120225 is a wasteful number, since it uses less digits than its factorization.

8120225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324819 (or 324814 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 8120225 is about 2849.6008492419. The cubic root of 8120225 is about 200.9968977187.

The spelling of 8120225 in words is "eight million, one hundred twenty thousand, two hundred twenty-five".