261
261 is an odd composite number composed of two prime numbers multiplied together.
261 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.
Prime factorization of 261:
3^{2} × 29^{}
(3 × 3 × 29)See below for interesting mathematical facts about the number 261 from the Numbermatics database.
Names of 261
 Cardinal: 261 can be written as Two hundred sixtyone.
Scientific notation
 Scientific notation: 2.61 × 10^{2}
Factors of 261
Divisors of 261
Bases of 261
 Binary: 100000101_{2}
 Hexadecimal: 0x105
 Base36: 79
Squares and roots of 261
Scales and comparisons
How big is 261? 261 seconds is equal to 4 minutes, 21 seconds.

To count from 1 to 261 would take you about two minutes.
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomlychosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
 A cube with a volume of 261 cubic inches would be around 0.5 feet tall.
Recreational maths with 261
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The information we have on file for 261 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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