404585 has 4 divisors (see below), whose sum is σ = 485508. Its totient is φ = 323664.

The previous prime is 404557. The next prime is 404597. The reversal of 404585 is 585404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87616 + 316969 = 296^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 404585 - 2¹⁶ = 339049 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404585.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40454 + ... + 40463.

It is an arithmetic number, because the mean of its divisors is an integer number (121377).

2⁴⁰⁴⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

404585 is a deficient number, since it is larger than the sum of its proper divisors (80923).

404585 is an equidigital number, since it uses as much as digits as its factorization.

404585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80922.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 404585 is about 636.0699647051. The cubic root of 404585 is about 73.9610825313.

Adding to 404585 its reverse (585404), we get a palindrome (989989).

It can be divided in two parts, 404 and 585, that added together give a palindrome (989).

The spelling of 404585 in words is "four hundred four thousand, five hundred eighty-five".