6441209 has 8 divisors (see below), whose sum is σ = 6925440. Its totient is φ = 5971536.

The previous prime is 6441199. The next prime is 6441229. The reversal of 6441209 is 9021446.

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 6441209 - 2⁸ = 6440953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6441229) 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, 2714 + ... + 4499.

It is an arithmetic number, because the mean of its divisors is an integer number (865680).

Almost surely, 2^6441209 is an apocalyptic number.

It is an amenable number.

6441209 is a deficient number, since it is larger than the sum of its proper divisors (484231).

6441209 is a wasteful number, since it uses less digits than its factorization.

6441209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7279.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 6441209 is about 2537.9537032814. The cubic root of 6441209 is about 186.0611911822.

It can be divided in two parts, 64 and 41209, that multiplied together give a square (2637376 = 1624²).

The spelling of 6441209 in words is "six million, four hundred forty-one thousand, two hundred nine".