3665825 has 12 divisors (see below), whose sum is σ = 4569648. Its totient is φ = 2917200.

The previous prime is 3665819. The next prime is 3665839. The reversal of 3665825 is 5285663.

It is not a de Polignac number, because 3665825 - 2¹⁸ = 3403681 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 6² + 6⁸ + 5 + 8⁵ + 2⁵ + 5⁹ .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8054 + ... + 8496.

It is an arithmetic number, because the mean of its divisors is an integer number (380804).

Almost surely, 2^3665825 is an apocalyptic number.

It is an amenable number.

3665825 is a deficient number, since it is larger than the sum of its proper divisors (903823).

3665825 is a wasteful number, since it uses less digits than its factorization.

3665825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 779 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 3665825 is about 1914.6344298586. The cubic root of 3665825 is about 154.1903672677.

The spelling of 3665825 in words is "three million, six hundred sixty-five thousand, eight hundred twenty-five".