3925405 has 16 divisors (see below), whose sum is σ = 5184000. Its totient is φ = 2829760.

The previous prime is 3925403. The next prime is 3925421. The reversal of 3925405 is 5045293.

It is not a de Polignac number, because 3925405 - 2¹ = 3925403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7956 + ... + 8434.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

Almost surely, 2^3925405 is an apocalyptic number.

It is an amenable number.

3925405 is a deficient number, since it is larger than the sum of its proper divisors (1258595).

3925405 is a wasteful number, since it uses less digits than its factorization.

3925405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 3925405 is about 1981.2634857585. The cubic root of 3925405 is about 157.7471386684.

The spelling of 3925405 in words is "three million, nine hundred twenty-five thousand, four hundred five".