7221725 has 24 divisors (see below), whose sum is σ = 10594560. Its totient is φ = 4777920.

The previous prime is 7221707. The next prime is 7221733. The reversal of 7221725 is 5271227.

7221725 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 7221725 - 2⁶ = 7221661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7221694 and 7221703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4364 + ... + 5786.

It is an arithmetic number, because the mean of its divisors is an integer number (441440).

Almost surely, 2^7221725 is an apocalyptic number.

It is an amenable number.

7221725 is a deficient number, since it is larger than the sum of its proper divisors (3372835).

7221725 is a wasteful number, since it uses less digits than its factorization.

7221725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1464 counting only the distinct ones).

The product of its digits is 1960, while the sum is 26.

The square root of 7221725 is about 2687.3267386010. The cubic root of 7221725 is about 193.2918972501.

The spelling of 7221725 in words is "seven million, two hundred twenty-one thousand, seven hundred twenty-five".