10821

10,821 is an odd composite number composed of two prime numbers multiplied together.

What does the number 10821 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

10821 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 10821:

3 × 3607

See below for interesting mathematical facts about the number 10821 from the Numbermatics database.

Names of 10821

Cardinal: 10821 can be written as Ten thousand, eight hundred twenty-one.

Scientific notation

Scientific notation: 1.0821 × 10⁴

Factors of 10821

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 3610

Divisors of 10821

Number of divisors d(n): 4
Complete list of divisors:
1 3 3607 10821
Sum of all divisors σ(n): 14432
Sum of proper divisors (its aliquot sum) s(n): 3611
10821 is a deficient number, because the sum of its proper divisors (3611) is less than itself. Its deficiency is 7210

Bases of 10821

Binary: 10101001000101₂
Hexadecimal: 0x2A45
Base-36: 8CL

Squares and roots of 10821

10821 squared (10821²) is 117094041
10821 cubed (10821³) is 1267074617661
The square root of 10821 is 104.0240356841
The cube root of 10821 is 22.1185065051

Scales and comparisons

How big is 10821?

10,821 seconds is equal to 3 hours, 21 seconds.
To count from 1 to 10,821 would take you about three 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 10821 cubic inches would be around 1.8 feet tall.

Recreational maths with 10821

10821 backwards is 12801
The number of decimal digits it has is: 5
The sum of 10821's digits is 12
More coming soon!

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The information we have on file for 10821 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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