3905725 has 6 divisors (see below), whose sum is σ = 4843130. Its totient is φ = 3124560.

The previous prime is 3905717. The next prime is 3905753. The reversal of 3905725 is 5275093.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12996 + 3892729 = 114^2 + 1973^2 .

It is not a de Polignac number, because 3905725 - 2³ = 3905717 is a prime.

It is a congruent 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, 78090 + ... + 78139.

Almost surely, 2^3905725 is an apocalyptic number.

It is an amenable number.

3905725 is a deficient number, since it is larger than the sum of its proper divisors (937405).

3905725 is a wasteful number, since it uses less digits than its factorization.

3905725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156239 (or 156234 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 3905725 is about 1976.2907174806. The cubic root of 3905725 is about 157.4830753629.

The spelling of 3905725 in words is "three million, nine hundred five thousand, seven hundred twenty-five".