404045 has 4 divisors (see below), whose sum is σ = 484860. Its totient is φ = 323232.

The previous prime is 404029. The next prime is 404051. The reversal of 404045 is 540404.

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 228484 + 175561 = 478^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 404045 - 2⁴ = 404029 is a prime.

It is a congruent number.

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, 40400 + ... + 40409.

It is an arithmetic number, because the mean of its divisors is an integer number (121215).

2⁴⁰⁴⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

404045 is a deficient number, since it is larger than the sum of its proper divisors (80815).

404045 is an equidigital number, since it uses as much as digits as its factorization.

404045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80814.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 404045 is about 635.6453413658. The cubic root of 404045 is about 73.9281625708.

Adding to 404045 its reverse (540404), we get a palindrome (944449).

The spelling of 404045 in words is "four hundred four thousand, forty-five".