6442165 has 8 divisors (see below), whose sum is σ = 7748568. Its totient is φ = 5141760.

The previous prime is 6442153. The next prime is 6442169. The reversal of 6442165 is 5612446.

6442165 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 715716 + 5726449 = 846^2 + 2393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6442165 - 2⁹ = 6441653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369 + ... + 3841.

It is an arithmetic number, because the mean of its divisors is an integer number (968571).

Almost surely, 2^6442165 is an apocalyptic number.

It is an amenable number.

6442165 is a deficient number, since it is larger than the sum of its proper divisors (1306403).

6442165 is a wasteful number, since it uses less digits than its factorization.

6442165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999.

The product of its digits is 5760, while the sum is 28.

The square root of 6442165 is about 2538.1420370027. The cubic root of 6442165 is about 186.0703957533.

It can be divided in two parts, 644 and 2165, that added together give a square (2809 = 53²).

The spelling of 6442165 in words is "six million, four hundred forty-two thousand, one hundred sixty-five".