One is a special number because it is neither prime nor composite. It only has one factor, which is one. It can also be multiplied to any number to not change the product from the original number.
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1 is the smallest natural number. 1 is the factor of every number. 1 is neither prime nor composite.
1 is the only number that goes into 71 and 100.
the number 1 is neither. it is a special number. prime, nor composite.
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.