405004 has 18 divisors (see below), whose sum is σ = 756420. Its totient is φ = 189216.

The previous prime is 405001. The next prime is 405011. The reversal of 405004 is 400504.

405004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (405001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5512 + ... + 5584.

2⁴⁰⁵⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

405004 is a deficient number, since it is larger than the sum of its proper divisors (351416).

405004 is a wasteful number, since it uses less digits than its factorization.

405004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 405004 is about 636.3992457569. The cubic root of 405004 is about 73.9866058056.

Adding to 405004 its reverse (400504), we get a palindrome (805508).

It can be divided in two parts, 40500 and 4, that added together give a palindrome (40504).

The spelling of 405004 in words is "four hundred five thousand, four".