"Four Hundred Fifty-Six" is a numerical value that represents the quantity of 456. It is often used in various contexts, such as counting items, measuring distances, or indicating a specific order in a sequence. The number can be expressed in different numeral systems, including Roman numerals as CDLVI. In mathematics, 456 is an even number and can be factored into its prime components, which are 2, 3, 19, and 4. It is also notable for being the sum of the first 21 positive integers, making it a triangular number.