125 (number)
| ||||
|---|---|---|---|---|
| Cardinal | one hundred twenty-five | |||
| Ordinal | 125th (one hundred twenty-fifth) | |||
| Factorization | 53 | |||
| Divisors | 1, 5, 25, 125 | |||
| Greek numeral | ||||
| Roman numeral | CXXV | |||
| Binary | 11111012 | |||
| Ternary | 111223 | |||
| Senary | 3256 | |||
| Octal | 1758 | |||
| Duodecimal | A512 | |||
| Hexadecimal | 7D16 | |||
125 (one hundred [and] twenty-five) is the natural number following 124 and preceding 126.
In mathematics[edit]
125 is the cube of 5. It can be expressed as a sum of two squares in two different ways, 125 = 10² + 5² = 11² + 2².[1]
125 and 126 form a Ruth-Aaron pair under the second definition in which repeated prime factors are counted as often as they occur.
Like many other powers of 5, it is a Friedman number in base 10 since 125 = 51 + 2.
125 is the center of a close triplet of perfect powers, (121 = 112, 125 = 53, 128 = 27). Excluding the trivial cases of 0 and 1, the only closer such triplet is (4,8,9) and the only other equally close is (25, 27, 32).[2]
U.S. military[edit]
- Air National Guard 125th Special Tactics Squadron unit in Portland, Oregon
- US Air Force 125th Fighter Wing, Air National Guard unit at Jacksonville International Airport, Florida
- US Navy VAW-125 squadron at Naval Station Norfolk, Virginia
- US Navy VFA-125 strike fighter squadron at Naval Air Station Lemoore, California
- USNS Mission San Jose (T-AO-125), a US Navy fleet oiler during World War II
- USS Tide (AM-125), a US Navy minesweeper
- Northrop YC-125 Raider utility transport plane
In transportation[edit]
- The Fiat 125 automobile
- Many motorcycle licenses and racing events limit engine capacity to 125cc. Examples of 125cc motorcycles include;
- The Honda XRM 125 motorcycle
- The Yamaha YZ125, for motocross
- The Harlem-125th Street (Metro-North) station serving Harlem, New York City
- The InterCity 125, sometimes referred to simply as "one two five", a British high-speed train
- New Jersey Transit bus route 125
- London Buses route 125 is a Transport for London contracted bus route in London
- 125 is the number of many roads, including Mexican Federal Highway 125
- Pan Am Flight 125 from London’s Heathrow Airport to New York's John F. Kennedy International Airport which had pressurization problems on March 10, 1987
- The 125th Street Bridge crosses the Mississippi River in Minnesota
- STS-125, a Space Shuttle Atlantis mission, the final mission to service the Hubble Space Telescope, launched May 11, 2009 at 2:01 pm EDT landed May 24, 2009 at 11:39:05 am EDT
- 125 (dinghy) - a class of sailing dingy popular in Australia.
- EMD F125 locomotive manufactured by Electro Motive Diesel.
In other fields[edit]
125 is also:
- The year AD 125 or 125 BC
- 125 AH is a year in the Islamic calendar that corresponds to 742 – 743 CE
- 125 Liberatrix is a Main belt asteroid
- The atomic number of the yet-to-be-discovered element unbipentium
- Sonnet 125 by William Shakespeare
- 125th Street, Manhattan, New York City
- 125th Street (New York City Subway), multiple subway stations
- CA-125, also known as CA125, is an abbreviation for cancer antigen 125
- 125 High Street is a 30-floor high-rise in Boston
- The highest number of analog cable-ready channels an American television set receives.
See also[edit]
- 125th (disambiguation)
- 125th Anniversary of the Confederation of Canada Medal
- 125th Street (disambiguation)
- List of highways numbered 125
- United Nations Security Council Resolution 125
References[edit]
- ^ Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 136
- ^ Noe, Anthony. "Solutions to Pillai's equation for n <= 100". Retrieved 5 September 2022.