The number 1 is the first natural number and represents a single unit. It is often associated with concepts of unity and individuality. In mathematics, 1 is the multiplicative identity, meaning any number multiplied by 1 remains unchanged. The number 2 is the second natural number and signifies a pair or duality. It is the first even number and is often used to represent balance or opposition, such as in the concept of duality. In mathematics, 2 is also the smallest prime number, meaning it can only be divided by 1 and itself.