25 (number)

25 (twenty-five) is the natural number following 24 and preceding 26.

In mathematics

It is a square number, being 5² = 5 × 5. It is the smallest square that is also a sum of two (non-zero) squares: 25 = 3² + 4². Hence it often appears in illustrations of the Pythagorean theorem.

25 is a centered octagonal number, a centered square number, and an automorphic number.

25 percent (%) is equal to 1/4.

25 has an aliquot sum of 6 and number 6 is the first (or smallest) number to have an aliquot sequence that does not culminate in 0 through a prime. Twenty-five is the aliquot sum of three integers; 95, 119, and 143. Twenty-five is the second composite member of the 6-aliquot tree.

It is the smallest base 10 Friedman number as it can be expressed by its own numbers: 5².

It is also a Cullen number. 25 is the smallest pseudoprime satisfying the congruence 7ⁿ = 7 mod n.

25 is the smallest aspiring number — a composite non-sociable number whose aliquot sequence does not terminate.

According to the Shapiro inequality, 25 is the least odd integer n such that there exist x₁, x₂, …, x_n such that

DJ Premier

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Christopher Edward Martin (born March 21, 1966), better known by his stage name DJ Premier (also known as Preem, Premo, or Primo), is an American Record Producer and DJ, and was half of the hip hop duo Gang Starr—alongside the emcee Guru—and forms half of the hip hop duo PRhyme, together with Royce Da 5'9".

For its 20th-anniversary issue in 2008, The Source selected DJ Premier for its list of the 20 greatest producers in the magazine's 20-year history. He also made the finals in Vibe magazine's 2010 search for the greatest hip hop producer of all time—he finished second after Dr. Dre received 62 percent of the votes.

DJ Premier hosts a weekly two-hour show, Live From HeadQCourterz, on Sirius Satellite Radio's Hip-Hop Nation every Friday.

On July 9, 2015, DJ Premier was chosen as one of three producers to curate the soundtrack to the forthcoming NBA 2K16, alongside DJ Khaled and DJ Mustard.

Dave Matthews

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David John "Dave" Matthews (born January 9, 1967) is a South African-born American singer-songwriter, musician and actor, best known as the lead vocalist, songwriter, and guitarist for the Dave Matthews Band. Matthews was born in Johannesburg, South Africa and moved to Westchester County, New York at the age of 2. Matthews mainly plays acoustic guitar, which he started playing at age 9.

From 1991 to 2003, Matthews predominantly focused on songwriting and performing with the Dave Matthews Band, which he started in Charlottesville, Virginia in 1991. Since then, he has also done various solo performances and produced other records. During the period from 2000 to 2010, his band sold more tickets and earned more money than any other act in North America. The band's most recent album, Away from the World, released in 2012, made them the only group to have six consecutive studio albums debut at number one on the Billboard charts.