4,021 in words
4,021
four thousand and twenty-one
4,021 is written four thousand and twenty-one.
Ways to write it
- As an ordinal
- four thousand and twenty-first
- Expanded form
- 4,000 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 4 | 4,000 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 4,021 (2 factors)
- First 10 multiples
- 4,021, 8,042, 12,063, 16,084, 20,105, 24,126, 28,147, 32,168, 36,189, 40,210
- Square
- 4,021 × 4,021 = 16,168,441
- Square root
- ≈ 63.41
- Sum of the digits
- 4 + 0 + 2 + 1 = 7
- Rounded to the nearest 10
- 4,020
- Rounded to the nearest 100
- 4,000
- Rounded to the nearest 1000
- 4,000
- Number before
- 4,020
- Number after
- 4,022
- In binary
111110110101
Quick check
What number comes just after 4,021?
Show the answer
4,022
Is 4,021 even or odd?
Show the answer
Odd
What is 4,021 + 10?
Show the answer
4,031
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 4,021 in words?
4,021 is written "four thousand and twenty-one".
Is 4,021 a prime number?
Yes. 4,021 is a prime number: its only factors are 1 and 4,021.
What are the factors of 4,021?
The factors of 4,021 are 1 and 4,021.