6441005 has 4 divisors (see below), whose sum is σ = 7729212. Its totient is φ = 5152800.

The previous prime is 6440999. The next prime is 6441031. The reversal of 6441005 is 5001446.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3279721 + 3161284 = 1811^2 + 1778^2 .

It is not a de Polignac number, because 6441005 - 2¹² = 6436909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644096 + ... + 644105.

It is an arithmetic number, because the mean of its divisors is an integer number (1932303).

Almost surely, 2^6441005 is an apocalyptic number.

It is an amenable number.

6441005 is a deficient number, since it is larger than the sum of its proper divisors (1288207).

6441005 is a wasteful number, since it uses less digits than its factorization.

6441005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288206.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 6441005 is about 2537.9135131048. The cubic root of 6441005 is about 186.0592269089.

The spelling of 6441005 in words is "six million, four hundred forty-one thousand, five".