21397
21,397 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.
21397 is a prime number. Like all primes (except two), it is an odd number.
Prime factorization of 21397:
21397
See below for interesting mathematical facts about the number 21397 from the Numbermatics database.
Names of 21397
- Cardinal: 21397 can be written as Twenty-one thousand, three hundred ninety-seven.
Scientific notation
- Scientific notation: 2.1397 × 104
Factors of 21397
Divisors of 21397
Bases of 21397
- Binary: 1010011100101012
- Hexadecimal: 0x5395
- Base-36: GID
Squares and roots of 21397
- 21397 squared (213972) is 457831609
- 21397 cubed (213973) is 9796222937773
-
The
square root of 21397 is 146.2771342349 -
The
cube root of 21397 is 27.7620135739
Scales and comparisons
How big is 21397?- 21,397 seconds is equal to 5 hours, 56 minutes, 37 seconds.
-
To count from 1 to 21,397 would take you about five hours.
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 randomly-chosen 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 21397 cubic inches would be around 2.3 feet tall.
Recreational maths with 21397
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The information we have on file for 21397 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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