404512005 has 16 divisors (see below), whose sum is σ = 647512704. Its totient is φ = 215641920.

The previous prime is 404512001. The next prime is 404512021. The reversal of 404512005 is 500215404.

It is not a de Polignac number, because 404512005 - 2² = 404512001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404512001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38635 + ... + 47975.

It is an arithmetic number, because the mean of its divisors is an integer number (40469544).

Almost surely, 2^404512005 is an apocalyptic number.

It is an amenable number.

404512005 is a deficient number, since it is larger than the sum of its proper divisors (243000699).

404512005 is a wasteful number, since it uses less digits than its factorization.

404512005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12236.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 404512005 is about 20112.4838098132. The cubic root of 404512005 is about 739.5663425804.

Adding to 404512005 its reverse (500215404), we get a palindrome (904727409).

The spelling of 404512005 in words is "four hundred four million, five hundred twelve thousand, five".