7717225 has 12 divisors (see below), whose sum is σ = 9804060. Its totient is φ = 6022400.

The previous prime is 7717207. The next prime is 7717231. The reversal of 7717225 is 5227177.

It can be written as a sum of positive squares in 6 ways, for example, as 1841449 + 5875776 = 1357^2 + 2424^2 .

It is not a de Polignac number, because 7717225 - 2⁹ = 7716713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2740 + ... + 4789.

It is an arithmetic number, because the mean of its divisors is an integer number (817005).

Almost surely, 2^7717225 is an apocalyptic number.

It is an amenable number.

7717225 is a deficient number, since it is larger than the sum of its proper divisors (2086835).

7717225 is a wasteful number, since it uses less digits than its factorization.

7717225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580 (or 7575 counting only the distinct ones).

The product of its digits is 6860, while the sum is 31.

The square root of 7717225 is about 2777.9893808292. The cubic root of 7717225 is about 197.6152187817.

The spelling of 7717225 in words is "seven million, seven hundred seventeen thousand, two hundred twenty-five".