One Thousand and One Nights (Arabic: كتاب ألف ليلة وليلة‎ Kitāb alf laylah wa-laylah) is a collection of Middle Eastern and South Asian stories and folk tales compiled in Arabic during the Islamic Golden Age. It is often known in English as the Arabian Nights, from the first English language edition (1706), which rendered the title as The Arabian Nights' Entertainment.

The work was collected over many centuries by various authors, translators and scholars across the Middle East, Central Asia and North Africa. The tales themselves trace their roots back to ancient and medieval Arabic, Persian, Indian, Turkish, Egyptian and Mesopotamian folklore and literature. In particular, many tales were originally folk stories from the Caliphate era, while others, especially the frame story, are most probably drawn from the Pahlavi Persian work Hazār Afsān (Persian: هزار افسان‎, lit. A Thousand Tales) which in turn relied partly on Indian elements.

What is common throughout all the editions of the Nights is the initial frame story of the ruler Shahryār (from Persian: شهريار‎, meaning "king" or "sovereign") and his wife Scheherazade (from Persian: شهرزاد‎, possibly meaning "of noble lineage") and the framing device incorporated throughout the tales themselves. The stories proceed from this original tale; some are framed within other tales, while others begin and end of their own accord. Some editions contain only a few hundred nights, while others include 1,001 or more.

1001 is the natural number following 1000 and followed by 1002.

One thousand and one is a sphenic number, a pentagonal number, a pentatope number and the first four-digit palindromic number.

It is sometimes used as a generic term for "many" - conveying the impression of a lot (1000) and still more:

In Arabic culture, this is phrased in an unusual way:

1001 was the name of a popular British detergent in the 1960s, supposedly with "1001 uses".

In the Mawlawiyyah order of Sufi Islam, a novice must complete 1001 days of prayer before becoming a dada, or junior teacher of the faith.

In many cases, including the title Thousand and One Nights, 1001 is meant to indicate a "big number", and need not be taken literally. A book published in 2007 titled 40 Days & 1001 Nights describes a journey through the Islamic World.

There are countless book titles starting with 1001. About twice as many books currently in print start with 1001 as with 1000.^{[citation needed]} This marketing scheme is used to imply that the customer is getting a little extra information beyond books that have only 1000 items.^{[citation needed]} For example:

Katharine Hope McPhee (born March 25, 1984) is an American pop singer, songwriter and actress. She gained fame as a contestant on the fifth season of the Fox reality show American Idol in 2006, eventually finishing as the runner-up.

Her self-titled debut album was released on RCA Records on January 30, 2007 and debuted at number two on the Billboard 200; it has sold 381,000 copies to date. The album's first single, "Over It", was a Pop Top 30 hit and was certified gold in 2008.

Her second album, Unbroken, was released on Verve Forecast Records on January 5, 2010 and debuted at number 27 on the Billboard 200. The album featured the single "Had It All", which peaked at number 22 on the Billboard AC chart. It has sold 45,000 copies to date. Her third album, the holiday-themed Christmas Is the Time to Say I Love You, was released on October 12, 2010. The album debuted at number eleven on the Billboard Top Holiday Albums chart while the single "Have Yourself a Merry Little Christmas" peaked at number sixteen on the Billboard AC chart. The album has sold 23,000 copies to date.