2004865 has 8 divisors (see below), whose sum is σ = 2435328. Its totient is φ = 1584240.

The previous prime is 2004851. The next prime is 2004881. The reversal of 2004865 is 5684002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2004865 - 2⁵ = 2004833 is a prime.

It is a Duffinian number.

2004865 is a lucky number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2001 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (304416).

2^2004865 is an apocalyptic number.

It is an amenable number.

2004865 is a deficient number, since it is larger than the sum of its proper divisors (430463).

2004865 is an equidigital number, since it uses as much as digits as its factorization.

2004865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2004865 is about 1415.9325548909. The cubic root of 2004865 is about 126.0941808661.

Adding to 2004865 its reverse (5684002), we get a palindrome (7688867).

The spelling of 2004865 in words is "two million, four thousand, eight hundred sixty-five".