404765 has 4 divisors (see below), whose sum is σ = 485724. Its totient is φ = 323808.

The previous prime is 404713. The next prime is 404773. The reversal of 404765 is 567404.

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 114244 + 290521 = 338^2 + 539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 404765.

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, 40472 + ... + 40481.

It is an arithmetic number, because the mean of its divisors is an integer number (121431).

2⁴⁰⁴⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

404765 is a deficient number, since it is larger than the sum of its proper divisors (80959).

404765 is an equidigital number, since it uses as much as digits as its factorization.

404765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80958.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 404765 is about 636.2114428396. The cubic root of 404765 is about 73.9720493418.

The spelling of 404765 in words is "four hundred four thousand, seven hundred sixty-five".