3998025 has 24 divisors (see below), whose sum is σ = 7345760. Its totient is φ = 2131920.

The previous prime is 3998003. The next prime is 3998041. The reversal of 3998025 is 5208993.

3998025 = T₅₅₃ + T₅₅₄ + ... + T₅₇₇.

It is not a de Polignac number, because 3998025 - 2⁵ = 3997993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2287 + ... + 3636.

Almost surely, 2^3998025 is an apocalyptic number.

It is an amenable number.

3998025 is a deficient number, since it is larger than the sum of its proper divisors (3347735).

3998025 is a wasteful number, since it uses less digits than its factorization.

3998025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942 (or 5931 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 3998025 is about 1999.5061890377. The cubic root of 3998025 is about 158.7139749201.

The spelling of 3998025 in words is "three million, nine hundred ninety-eight thousand, twenty-five".