3959825 has 6 divisors (see below), whose sum is σ = 4910214. Its totient is φ = 3167840.

The previous prime is 3959819. The next prime is 3959833. The reversal of 3959825 is 5289593.

It can be written as a sum of positive squares in 3 ways, for example, as 1164241 + 2795584 = 1079^2 + 1672^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3959825 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79172 + ... + 79221.

It is an arithmetic number, because the mean of its divisors is an integer number (818369).

Almost surely, 2^3959825 is an apocalyptic number.

It is an amenable number.

3959825 is a deficient number, since it is larger than the sum of its proper divisors (950389).

3959825 is a wasteful number, since it uses less digits than its factorization.

3959825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158403 (or 158398 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 3959825 is about 1989.9309033230. The cubic root of 3959825 is about 158.2068673123.

The spelling of 3959825 in words is "three million, nine hundred fifty-nine thousand, eight hundred twenty-five".