7917425 has 6 divisors (see below), whose sum is σ = 9817638. Its totient is φ = 6333920.

The previous prime is 7917421. The next prime is 7917443. The reversal of 7917425 is 5247197.

It can be written as a sum of positive squares in 3 ways, for example, as 71824 + 7845601 = 268^2 + 2801^2 .

It is not a de Polignac number, because 7917425 - 2² = 7917421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7917421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158324 + ... + 158373.

It is an arithmetic number, because the mean of its divisors is an integer number (1636273).

Almost surely, 2^7917425 is an apocalyptic number.

It is an amenable number.

7917425 is a deficient number, since it is larger than the sum of its proper divisors (1900213).

7917425 is a wasteful number, since it uses less digits than its factorization.

7917425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316707 (or 316702 counting only the distinct ones).

The product of its digits is 17640, while the sum is 35.

The square root of 7917425 is about 2813.7919254984. The cubic root of 7917425 is about 199.3094937492.

The spelling of 7917425 in words is "seven million, nine hundred seventeen thousand, four hundred twenty-five".