2004405 has 32 divisors (see below), whose sum is σ = 3642240. Its totient is φ = 933120.

The previous prime is 2004383. The next prime is 2004421. The reversal of 2004405 is 5044002.

It is not a de Polignac number, because 2004405 - 2⁶ = 2004341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3435 + ... + 3975.

It is an arithmetic number, because the mean of its divisors is an integer number (113820).

2^2004405 is an apocalyptic number.

It is an amenable number.

2004405 is a deficient number, since it is larger than the sum of its proper divisors (1637835).

2004405 is a wasteful number, since it uses less digits than its factorization.

2004405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 2004405 is about 1415.7701084569. The cubic root of 2004405 is about 126.0845363664.

Adding to 2004405 its reverse (5044002), we get a palindrome (7048407).

The spelling of 2004405 in words is "two million, four thousand, four hundred five".