404121605 has 8 divisors (see below), whose sum is σ = 490789152. Its totient is φ = 319401808.

The previous prime is 404121589. The next prime is 404121607. The reversal of 404121605 is 506121404.

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

It is a cyclic number.

It is not a de Polignac number, because 404121605 - 2⁴ = 404121589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404121607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486479 + ... + 487308.

It is an arithmetic number, because the mean of its divisors is an integer number (61348644).

Almost surely, 2^404121605 is an apocalyptic number.

It is an amenable number.

404121605 is a deficient number, since it is larger than the sum of its proper divisors (86667547).

404121605 is an equidigital number, since it uses as much as digits as its factorization.

404121605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973875.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 404121605 is about 20102.7760520780. The cubic root of 404121605 is about 739.3283441765.

The spelling of 404121605 in words is "four hundred four million, one hundred twenty-one thousand, six hundred five".