6445289 has 4 divisors (see below), whose sum is σ = 6619524. Its totient is φ = 6271056.

The previous prime is 6445259. The next prime is 6445319. The reversal of 6445289 is 9825446.

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

It is an interprime number because it is at equal distance from previous prime (6445259) and next prime (6445319).

It can be written as a sum of positive squares in 2 ways, for example, as 4840000 + 1605289 = 2200^2 + 1267^2 .

It is not a de Polignac number, because 6445289 - 2¹⁶ = 6379753 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 (6445259) 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 3 ways as a sum of consecutive naturals, for example, 87062 + ... + 87135.

It is an arithmetic number, because the mean of its divisors is an integer number (1654881).

Almost surely, 2^6445289 is an apocalyptic number.

It is an amenable number.

6445289 is a deficient number, since it is larger than the sum of its proper divisors (174235).

6445289 is a wasteful number, since it uses less digits than its factorization.

6445289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174234.

The product of its digits is 69120, while the sum is 38.

The square root of 6445289 is about 2538.7573732045. The cubic root of 6445289 is about 186.1004679408.

The spelling of 6445289 in words is "six million, four hundred forty-five thousand, two hundred eighty-nine".