What is 120 (number)?
{{Infobox number|number=120|divisor=1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120}} [[File:Schlegel_wireframe_120-cell.png|right|thumb|246x246px|The [[120-cell]] (or hecatonicosachoron) is a [[convex regular 4-polytope]] consisting of 120 [[Dodecahedron|dodecahedral]] [[Cell (geometry)|cells]]]] '''120''' is a [[natural number]]. It is before [[121 (number)|121]] and after [[119 (number)|119]]. It reads as one hundred [and] twenty. == In mathematics == === Subsets === * It is also the fifteenth [[triangular number]]. It is also the sum of the first eight triangular numbers. This makes it a tetrahedral number. 120 is [[Division (mathematics)|divisible]] by the first 5 [[Triangular number|triangular numbers]] and the first 4 tetrahedral numbers. It is the eighth hexagonal number. * 120 is a highly [[composite number]].<ref>{{Cite web|url=https://oeis.org/A002182|title=Sloane's A002182 : Highly composite numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-27}}</ref> It is also superior highly composite. * 120 is [[superabundant]]<ref>{{Cite web|url=https://oeis.org/A004394|title=Sloane's A004394 : Superabundant numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-27}}</ref> and a colossally [[abundant number]].<ref>{{Cite web|url=https://oeis.org/A004490|title=Sloane's A004490 : Colossally abundant numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-27}}</ref> * 120 is sparsely totient.<ref>{{Cite web|url=https://oeis.org/A036913|title=Sloane's A036913 : Sparsely totient numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-27}}</ref> * 120 is the smallest number to appear six times in [[Pascal's triangle]]. * 120 is a [[Harshad number]] in [[Decimal|base 10]].<ref>{{Cite web|url=https://oeis.org/A005349|title=Sloane's A005349 : Niven (or Harshad) numbers|website=The On-Line Encyclop