1



Properties

 * 1 is the first natural number
 * 1 is the second whole number
 * 1 is odd
 * It also is neither prime nor composite and is the only positive integer with this property
 * When any number is multiplied by its inverse, it always equals one
 * When any number is multiplied by one, the product is the original number (multiplicative identity)
 * It is a factor in every integer
 * 1 is represented by an I in Roman Numerals
 * 1 is the only odd practical number