Science Fair Project Encyclopedia
129 (number)
129 is the natural number following 128 and preceding 130.
| Cardinal | One hundred [and] twenty-nine |
| Ordinal | 129th |
| Factorization | 
|
| Roman numeral | CXXIX |
| Binary | 10000001 |
| Hexadecimal | 81 |
This number is the sum of the first ten prime numbers. It is the smallest number that can be expressed as a sum of three squares in four different ways: 112 + 22 + 22 and 102 + 52 + 22 and 82 + 82 + 12 and 82 + 72 + 42.
One hundred twenty-nine is also:
- The designation of a spur route of Interstate 29 in Sioux City, Iowa.
- The year AD 129 or 129 BC.
This page discusses the number 129. For the year, see 129.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details