3204665 has 4 divisors (see below), whose sum is σ = 3845604. Its totient is φ = 2563728.

The previous prime is 3204647. The next prime is 3204667. The reversal of 3204665 is 5664023.

3204665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5664023 = 257 ⋅22039.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 2725801 = 692^2 + 1651^2 .

It is a cyclic number.

It is not a de Polignac number, because 3204665 - 2¹⁸ = 2942521 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3204667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320462 + ... + 320471.

It is an arithmetic number, because the mean of its divisors is an integer number (961401).

Almost surely, 2^3204665 is an apocalyptic number.

It is an amenable number.

3204665 is a deficient number, since it is larger than the sum of its proper divisors (640939).

3204665 is an equidigital number, since it uses as much as digits as its factorization.

3204665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640938.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3204665 is about 1790.1578142723. The cubic root of 3204665 is about 147.4328335388.

Adding to 3204665 its reverse (5664023), we get a palindrome (8868688).

The spelling of 3204665 in words is "three million, two hundred four thousand, six hundred sixty-five".