6441605 has 8 divisors (see below), whose sum is σ = 7758072. Its totient is φ = 5134528.

The previous prime is 6441601. The next prime is 6441607. The reversal of 6441605 is 5061446.

It is a happy number.

6441605 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 1976836 + 4464769 = 1406^2 + 2113^2 .

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 6441605 - 2² = 6441601 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 (6441601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734 + ... + 3663.

It is an arithmetic number, because the mean of its divisors is an integer number (969759).

Almost surely, 2^6441605 is an apocalyptic number.

It is an amenable number.

6441605 is a deficient number, since it is larger than the sum of its proper divisors (1316467).

6441605 is a wasteful number, since it uses less digits than its factorization.

6441605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 6441605 is about 2538.0317176899. The cubic root of 6441605 is about 186.0650040648.

The spelling of 6441605 in words is "six million, four hundred forty-one thousand, six hundred five".