6406005 has 8 divisors (see below), whose sum is σ = 10249632. Its totient is φ = 3416528.

The previous prime is 6405989. The next prime is 6406051. The reversal of 6406005 is 5006046.

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 6406005 - 2⁴ = 6405989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213519 + ... + 213548.

It is an arithmetic number, because the mean of its divisors is an integer number (1281204).

Almost surely, 2^6406005 is an apocalyptic number.

It is an amenable number.

6406005 is a deficient number, since it is larger than the sum of its proper divisors (3843627).

6406005 is a wasteful number, since it uses less digits than its factorization.

6406005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427075.

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

The square root of 6406005 is about 2531.0086922016. The cubic root of 6406005 is about 185.7216034028.

The spelling of 6406005 in words is "six million, four hundred six thousand, five".