7997225 has 24 divisors (see below), whose sum is σ = 10856448. Its totient is φ = 5817600.

The previous prime is 7997219. The next prime is 7997237. The reversal of 7997225 is 5227997.

It is a happy number.

It is not a de Polignac number, because 7997225 - 2⁸ = 7996969 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12872 + ... + 13478.

It is an arithmetic number, because the mean of its divisors is an integer number (452352).

Almost surely, 2^7997225 is an apocalyptic number.

It is an amenable number.

7997225 is a deficient number, since it is larger than the sum of its proper divisors (2859223).

7997225 is a wasteful number, since it uses less digits than its factorization.

7997225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 660 counting only the distinct ones).

The product of its digits is 79380, while the sum is 41.

The square root of 7997225 is about 2827.9365268690. The cubic root of 7997225 is about 199.9768723257.

It can be divided in two parts, 79972 and 25, that added together give a palindrome (79997).

The spelling of 7997225 in words is "seven million, nine hundred ninety-seven thousand, two hundred twenty-five".