3981

3,981 is an odd composite number composed of two prime numbers multiplied together.

What does the number 3981 look like?

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

3981 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 3981:

3 × 1327

See below for interesting mathematical facts about the number 3981 from the Numbermatics database.

Names of 3981

Cardinal: 3981 can be written as Three thousand, nine hundred eighty-one.

Scientific notation

Scientific notation: 3.981 × 10³

Factors of 3981

Number of distinct prime factors ω(n): 2
Total number of prime factors Ω(n): 2
Sum of prime factors: 1330

Divisors of 3981

Number of divisors d(n): 4
Complete list of divisors:
1 3 1327 3981
Sum of all divisors σ(n): 5312
Sum of proper divisors (its aliquot sum) s(n): 1331
3981 is a deficient number, because the sum of its proper divisors (1331) is less than itself. Its deficiency is 2650

Bases of 3981

Binary: 111110001101₂
Hexadecimal: 0xF8D
Base-36: 32L

Squares and roots of 3981

3981 squared (3981²) is 15848361
3981 cubed (3981³) is 63092325141
The square root of 3981 is 63.0951662173
The cube root of 3981 is 15.8488367691

Scales and comparisons

How big is 3981?

3,981 seconds is equal to 1 hour, 6 minutes, 21 seconds.
To count from 1 to 3,981 would take you about six 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 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 3981 cubic inches would be around 1.3 feet tall.

Recreational maths with 3981

3981 backwards is 1893
The number of decimal digits it has is: 4
The sum of 3981's digits is 21
More coming soon!

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The information we have on file for 3981 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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