7990025 has 6 divisors (see below), whose sum is σ = 9907662. Its totient is φ = 6392000.

The previous prime is 7990001. The next prime is 7990057. The reversal of 7990025 is 5200997.

It can be written as a sum of positive squares in 3 ways, for example, as 43264 + 7946761 = 208^2 + 2819^2 .

It is not a de Polignac number, because 7990025 - 2⁸ = 7989769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7989973 and 7990000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159776 + ... + 159825.

It is an arithmetic number, because the mean of its divisors is an integer number (1651277).

Almost surely, 2^7990025 is an apocalyptic number.

It is an amenable number.

7990025 is a deficient number, since it is larger than the sum of its proper divisors (1917637).

7990025 is a wasteful number, since it uses less digits than its factorization.

7990025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319611 (or 319606 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 7990025 is about 2826.6632271992. The cubic root of 7990025 is about 199.9168404272.

The spelling of 7990025 in words is "seven million, nine hundred ninety thousand, twenty-five".