What is the loneliest number?

The loneliest number is a term used to describe the number one. This is because it is the only number that cannot be divided by any other whole number and still remain a whole number. It is also the first and smallest positive integer, highlighting its individuality. In popular culture, the concept of the loneliest number has been referenced in songs and movies, such as "One is the Loneliest Number" by Three Dog Night and in the film "The Number 23."