3909925 has 12 divisors (see below), whose sum is σ = 5016420. Its totient is φ = 3019520.

The previous prime is 3909923. The next prime is 3909943. The reversal of 3909925 is 5299093.

3909925 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 6 ways, for example, as 91809 + 3818116 = 303^2 + 1954^2 .

It is not a de Polignac number, because 3909925 - 2¹ = 3909923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909923) 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, 1972 + ... + 3421.

It is an arithmetic number, because the mean of its divisors is an integer number (418035).

Almost surely, 2^3909925 is an apocalyptic number.

It is an amenable number.

3909925 is a deficient number, since it is larger than the sum of its proper divisors (1106495).

3909925 is a wasteful number, since it uses less digits than its factorization.

3909925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432 (or 5427 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 3909925 is about 1977.3530286724. The cubic root of 3909925 is about 157.5395046617.

The spelling of 3909925 in words is "three million, nine hundred nine thousand, nine hundred twenty-five".