6,721 in words
6,721
six thousand seven hundred and twenty-one
6,721 is written six thousand seven hundred and twenty-one.
Ways to write it
- As an ordinal
- six thousand seven hundred and twenty-first
- Expanded form
- 6,000 + 700 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 6 | 6,000 |
| hundreds | 7 | 700 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 11, 13, 47, 143, 517, 611 and 6,721 (8 factors)
- First 10 multiples
- 6,721, 13,442, 20,163, 26,884, 33,605, 40,326, 47,047, 53,768, 60,489, 67,210
- Square
- 6,721 × 6,721 = 4,51,71,841
- Square root
- ≈ 81.98
- Sum of the digits
- 6 + 7 + 2 + 1 = 16
- Rounded to the nearest 10
- 6,720
- Rounded to the nearest 100
- 6,700
- Rounded to the nearest 1000
- 7,000
- Number before
- 6,720
- Number after
- 6,722
- In binary
1101001000001
Quick check
What number comes just after 6,721?
Show the answer
6,722
Is 6,721 even or odd?
Show the answer
Odd
What is 6,721 + 10?
Show the answer
6,731
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Number Patterns
Find the missing number in a sequence.Frequently asked questions
How do you write 6,721 in words?
6,721 is written "six thousand seven hundred and twenty-one".
Is 6,721 a prime number?
No. 6,721 is a composite number, because it has more than two factors.
What are the factors of 6,721?
The factors of 6,721 are 1, 11, 13, 47, 143, 517, 611 and 6,721.