2004505 has 8 divisors (see below), whose sum is σ = 2430792. Its totient is φ = 1586688.

The previous prime is 2004479. The next prime is 2004511. The reversal of 2004505 is 5054002.

2004505 = 93² + 94² + ... + 189².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 335241 + 1669264 = 579^2 + 1292^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2004505 - 2⁷ = 2004377 is a prime.

It is a Duffinian number.

2004505 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, 1582 + ... + 2551.

It is an arithmetic number, because the mean of its divisors is an integer number (303849).

2^2004505 is an apocalyptic number.

It is an amenable number.

2004505 is a deficient number, since it is larger than the sum of its proper divisors (426287).

2004505 is an equidigital number, since it uses as much as digits as its factorization.

2004505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 2004505 is about 1415.8054244846. The cubic root of 2004505 is about 126.0866331223.

Adding to 2004505 its reverse (5054002), we get a palindrome (7058507).

The spelling of 2004505 in words is "two million, four thousand, five hundred five".