The first if the Natural Numbers has many special mathematical, spiritual and philosophical properties.
In terms of mathematics, it is the identity element for multiplication, part of the definition of prime numbers. In spirituality, in Christianity, it is both the idea of a single god, and his significance in the religion, with the first commandment. The philosophical properties began with a mathematician named Descartes, inquiring about 'Does One say its own name?". The philosophical question impacts uniqueness in economics, science, philosophy, the Search for Extra Tereserial Intelligence, and Drake's equation estimating it.
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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.
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.
One thing that is special is that 2 + 2 = 2*2 = 2^2 = 4
Because 11 is a prime number which has only two factors which are itself and one
The number 2 is 'special' because it is the only prime number that is even.