7839225 has 18 divisors (see below), whose sum is σ = 14041326. Its totient is φ = 4180800.

The previous prime is 7839211. The next prime is 7839233. The reversal of 7839225 is 5229387.

It is a happy number.

7839225 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 21609 + 7817616 = 147^2 + 2796^2 .

It is not a de Polignac number, because 7839225 - 2⁸ = 7838969 is a prime.

It is a super-2 number, since 2×7839225² = 122906897201250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

7839225 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7839225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17196 + ... + 17645.

Almost surely, 2^7839225 is an apocalyptic number.

7839225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7839225 is a deficient number, since it is larger than the sum of its proper divisors (6202101).

7839225 is a wasteful number, since it uses less digits than its factorization.

7839225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34857 (or 34849 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 7839225 is about 2799.8616037226. The cubic root of 7839225 is about 198.6511315545.

The spelling of 7839225 in words is "seven million, eight hundred thirty-nine thousand, two hundred twenty-five".