6447243 has 12 divisors (see below), whose sum is σ = 9449384. Its totient is φ = 3907200.

The previous prime is 6447239. The next prime is 6447253. The reversal of 6447243 is 3427446.

It is not a de Polignac number, because 6447243 - 2² = 6447239 is a prime.

It is a super-3 number, since 3×6447243³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6447243.

It is not an unprimeable number, because it can be changed into a prime (6447253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8518 + ... + 9243.

Almost surely, 2^6447243 is an apocalyptic number.

6447243 is a deficient number, since it is larger than the sum of its proper divisors (3002141).

6447243 is a wasteful number, since it uses less digits than its factorization.

6447243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17786 (or 17775 counting only the distinct ones).

The product of its digits is 16128, while the sum is 30.

The square root of 6447243 is about 2539.1421779806. The cubic root of 6447243 is about 186.1192725578.

It can be divided in two parts, 644 and 7243, that added together give a palindrome (7887).

The spelling of 6447243 in words is "six million, four hundred forty-seven thousand, two hundred forty-three".