6405065 has 16 divisors (see below), whose sum is σ = 8126976. Its totient is φ = 4843440.

The previous prime is 6405059. The next prime is 6405067. The reversal of 6405065 is 5605046.

It is not a de Polignac number, because 6405065 - 2⁸ = 6404809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6405067) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 148934 + ... + 148976.

It is an arithmetic number, because the mean of its divisors is an integer number (507936).

Almost surely, 2^6405065 is an apocalyptic number.

It is an amenable number.

6405065 is a deficient number, since it is larger than the sum of its proper divisors (1721911).

6405065 is an frugal number, since it uses more digits than its factorization.

6405065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 6405065 is about 2530.8229886738. The cubic root of 6405065 is about 185.7125188617.

The spelling of 6405065 in words is "six million, four hundred five thousand, sixty-five".