8391225 has 24 divisors (see below), whose sum is σ = 14141952. Its totient is φ = 4388800.

The previous prime is 8391223. The next prime is 8391263. The reversal of 8391225 is 5221938.

It is a happy number.

8391225 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8391225 - 2¹ = 8391223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8391192 and 8391201.

It is not an unprimeable number, because it can be changed into a prime (8391223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2920 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (589248).

Almost surely, 2^8391225 is an apocalyptic number.

It is an amenable number.

8391225 is a deficient number, since it is larger than the sum of its proper divisors (5750727).

8391225 is a wasteful number, since it uses less digits than its factorization.

8391225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177 (or 2172 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 8391225 is about 2896.7611223572. The cubic root of 8391225 is about 203.2084619541.

The spelling of 8391225 in words is "eight million, three hundred ninety-one thousand, two hundred twenty-five".