6404585 has 8 divisors (see below), whose sum is σ = 8384256. Its totient is φ = 4657840.

The previous prime is 6404581. The next prime is 6404591. The reversal of 6404585 is 5854046.

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

It is not a de Polignac number, because 6404585 - 2² = 6404581 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 (6404581) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 58169 + ... + 58278.

It is an arithmetic number, because the mean of its divisors is an integer number (1048032).

Almost surely, 2^6404585 is an apocalyptic number.

It is an amenable number.

6404585 is a deficient number, since it is larger than the sum of its proper divisors (1979671).

6404585 is a wasteful number, since it uses less digits than its factorization.

6404585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116463.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 6404585 is about 2530.7281560847. The cubic root of 6404585 is about 185.7078796043.

It can be divided in two parts, 640 and 4585, that added together give a palindrome (5225).

The spelling of 6404585 in words is "six million, four hundred four thousand, five hundred eighty-five".