3990025 has 12 divisors (see below), whose sum is σ = 5328652. Its totient is φ = 2946240.

The previous prime is 3990011. The next prime is 3990029. The reversal of 3990025 is 5200993.

It can be written as a sum of positive squares in 6 ways, for example, as 1207801 + 2782224 = 1099^2 + 1668^2 .

It is not a de Polignac number, because 3990025 - 2⁷ = 3989897 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3989975 and 3990002.

It is not an unprimeable number, because it can be changed into a prime (3990029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5814 + ... + 6463.

Almost surely, 2^3990025 is an apocalyptic number.

It is an amenable number.

3990025 is a deficient number, since it is larger than the sum of its proper divisors (1338627).

3990025 is a wasteful number, since it uses less digits than its factorization.

3990025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12300 (or 12295 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 3990025 is about 1997.5046933612. The cubic root of 3990025 is about 158.6080426465.

The spelling of 3990025 in words is "three million, nine hundred ninety thousand, twenty-five".