6405995 has 16 divisors (see below), whose sum is σ = 8156928. Its totient is φ = 4821120.

The previous prime is 6405989. The next prime is 6406051. The reversal of 6405995 is 5995046.

It is not a de Polignac number, because 6405995 - 2⁴ = 6405979 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5177 + ... + 6293.

It is an arithmetic number, because the mean of its divisors is an integer number (509808).

Almost surely, 2^6405995 is an apocalyptic number.

6405995 is a deficient number, since it is larger than the sum of its proper divisors (1750933).

6405995 is a wasteful number, since it uses less digits than its factorization.

6405995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 6405995 is about 2531.0067167038. The cubic root of 6405995 is about 185.7215067635.

The spelling of 6405995 in words is "six million, four hundred five thousand, nine hundred ninety-five".