The number "901" can refer to various things, but it is commonly recognized as an area code in the United States. Specifically, the 901 area code serves the city of Memphis, Tennessee, and surrounding regions. It was established in 1947 and is known for its rich cultural heritage, including music genres like blues and rock 'n' roll. In addition to its geographical significance, "901" can also represent a numerical value. It is an integer that follows 900 and precedes 902. In mathematics, it can be analyzed in various contexts, such as in number theory or as part of a sequence.