The number "140" is an integer that follows 139 and precedes 141. It is an even number, meaning it is divisible by 2 without a remainder. In mathematics, 140 can be factored into prime numbers as 2 × 2 × 5 × 7. In the context of social media, Twitter originally limited posts, known as tweets, to 140 characters. This character limit was designed to encourage brevity and clarity in communication. Although the limit has since been increased, the number 140 remains significant in discussions about online communication.