7215925 has 24 divisors (see below), whose sum is σ = 9541800. Its totient is φ = 5402880.

The previous prime is 7215919. The next prime is 7215941. The reversal of 7215925 is 5295127.

It can be written as a sum of positive squares in 12 ways, for example, as 2022084 + 5193841 = 1422^2 + 2279^2 .

It is not a de Polignac number, because 7215925 - 2⁵ = 7215893 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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26691 + ... + 26959.

It is an arithmetic number, because the mean of its divisors is an integer number (397575).

Almost surely, 2^7215925 is an apocalyptic number.

It is an amenable number.

7215925 is a deficient number, since it is larger than the sum of its proper divisors (2325875).

7215925 is a wasteful number, since it uses less digits than its factorization.

7215925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 340 counting only the distinct ones).

The product of its digits is 6300, while the sum is 31.

The square root of 7215925 is about 2686.2473825022. The cubic root of 7215925 is about 193.2401370743.

The spelling of 7215925 in words is "seven million, two hundred fifteen thousand, nine hundred twenty-five".