144 (number)

Template:Infobox number 144 (one hundred [and] forty-four) is the natural number following 143 and preceding 145. It is coincidentally both the square of twelve (a dozen dozens, or one gross) and the twelfth Fibonacci number, and the only nontrivial number in the sequence that is square.<ref>Bryan Bunch, The Kingdom of Infinite Number. New York: W. H. Freeman & Company (2000): 165</ref><ref>Template:Cite journal</ref>

Mathematics

144 is a highly totient number.<ref>Template:Cite OEIS</ref>

144 is the smallest number whose fifth power is a sum of four (smaller) fifth powers. This solution was found in 1966 by L. J. Lander and T. R. Parkin, and disproved Euler's sum of powers conjecture. It was famously published in a paper by both authors, whose body consisted of only two sentences:<ref>Template:Cite journal</ref>

Template:Blockquote 144 is a square. (12²=144)

144° is two-fifths of a full turn.

The image shows 2 separate circles, both representing 2/5ths of a circle. The right circle first divides the circle with black lines into 5 and shades 2 of the parts. The left circle shows the same devided circle without black lines.

Two-fifths of a circle.

In other fields

File:CantonMahjongTiles 2.jpg

A traditional set of 144 Chinese Mahjong tiles.

• 1:144 scale is a scale used for some scale models.
• Several computers use 144Hz.

References

• Wells, D. The Penguin Dictionary of Curious and Interesting Numbers. London: Penguin Group. (1987): 139–140.

External links

• The Natural Number 144