One thing that is special is that 2 + 2 = 2*2 = 2^2 = 4
Chat with our AI personalities
The only number that matches the number of letters it has. Four letters for the number 4.
It is the smallest composite number that is both a perfect square and a perfect cube.
The number 2 is 'special' because it is the only prime number that is even.
Even though there are different special numbers, there is only one special number that falls under all the categories. The number one is special because it cannot be a prime or a composite number as one only has one factor: itself. So it is classified as a special number. There are, however, other special numbers in separate categories.
It is already a four-digit number.