42,721 in words
42,721
forty-two thousand seven hundred and twenty-one
42,721 is written forty-two thousand seven hundred and twenty-one.
Ways to write it
- As an ordinal
- forty-two thousand seven hundred and twenty-first
- Expanded form
- 40,000 + 2,000 + 700 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 4 | 40,000 |
| thousands | 2 | 2,000 |
| hundreds | 7 | 700 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 7, 17, 119, 359, 2,513, 6,103 and 42,721 (8 factors)
- First 10 multiples
- 42,721, 85,442, 128,163, 170,884, 213,605, 256,326, 299,047, 341,768, 384,489, 427,210
- Square
- 42,721 × 42,721 = 1,825,083,841
- Square root
- ≈ 206.69
- Sum of the digits
- 4 + 2 + 7 + 2 + 1 = 16
- Rounded to the nearest 10
- 42,720
- Rounded to the nearest 100
- 42,700
- Rounded to the nearest 1000
- 43,000
- Number before
- 42,720
- Number after
- 42,722
- In binary
1010011011100001
Quick check
What number comes just after 42,721?
Show the answer
42,722
Is 42,721 even or odd?
Show the answer
Odd
What is 42,721 + 10?
Show the answer
42,731
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 42,721 in words?
42,721 is written "forty-two thousand seven hundred and twenty-one".
Is 42,721 a prime number?
No. 42,721 is a composite number, because it has more than two factors.
What are the factors of 42,721?
The factors of 42,721 are 1, 7, 17, 119, 359, 2,513, 6,103 and 42,721.