7931225 has 12 divisors (see below), whose sum is σ = 9878460. Its totient is φ = 6316800.

The previous prime is 7931207. The next prime is 7931233. The reversal of 7931225 is 5221397.

It can be written as a sum of positive squares in 6 ways, for example, as 678976 + 7252249 = 824^2 + 2693^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7931225 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 6461 + ... + 7589.

It is an arithmetic number, because the mean of its divisors is an integer number (823205).

Almost surely, 2^7931225 is an apocalyptic number.

It is an amenable number.

7931225 is a deficient number, since it is larger than the sum of its proper divisors (1947235).

7931225 is a wasteful number, since it uses less digits than its factorization.

7931225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420 (or 1415 counting only the distinct ones).

The product of its digits is 3780, while the sum is 29.

The square root of 7931225 is about 2816.2430647939. The cubic root of 7931225 is about 199.4252247494.

The spelling of 7931225 in words is "seven million, nine hundred thirty-one thousand, two hundred twenty-five".