404555 has 4 divisors (see below), whose sum is σ = 485472. Its totient is φ = 323640.

The previous prime is 404539. The next prime is 404557. The reversal of 404555 is 555404.

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

It is not a de Polignac number, because 404555 - 2⁴ = 404539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404555.

It is not an unprimeable number, because it can be changed into a prime (404557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40451 + ... + 40460.

It is an arithmetic number, because the mean of its divisors is an integer number (121368).

2⁴⁰⁴⁵⁵⁵ is an apocalyptic number.

404555 is a deficient number, since it is larger than the sum of its proper divisors (80917).

404555 is an equidigital number, since it uses as much as digits as its factorization.

404555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80916.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 404555 is about 636.0463819565. The cubic root of 404555 is about 73.9592544134.

Adding to 404555 its reverse (555404), we get a palindrome (959959).

It can be divided in two parts, 404 and 555, that added together give a palindrome (959).

The spelling of 404555 in words is "four hundred four thousand, five hundred fifty-five".