6405006 has 16 divisors (see below), whose sum is σ = 12870144. Its totient is φ = 2124984.

The previous prime is 6404987. The next prime is 6405011. The reversal of 6405006 is 6005046.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056 + ... + 3731.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^6405006 is an apocalyptic number.

6405006 is an abundant number, since it is smaller than the sum of its proper divisors (6465138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6405006 is a wasteful number, since it uses less digits than its factorization.

6405006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 6405006 is about 2530.8113323596. The cubic root of 6405006 is about 185.7119486322.

The spelling of 6405006 in words is "six million, four hundred five thousand, six".