40,021 in words
40,021
forty thousand and twenty-one
40,021 is written forty thousand and twenty-one.
Ways to write it
- As an ordinal
- forty thousand and twenty-first
- Expanded form
- 40,000 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 4 | 40,000 |
| thousands | 0 | 0 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 31, 1,291 and 40,021 (4 factors)
- First 10 multiples
- 40,021, 80,042, 120,063, 160,084, 200,105, 240,126, 280,147, 320,168, 360,189, 400,210
- Square
- 40,021 × 40,021 = 1,601,680,441
- Square root
- ≈ 200.05
- Sum of the digits
- 4 + 0 + 0 + 2 + 1 = 7
- Rounded to the nearest 10
- 40,020
- Rounded to the nearest 100
- 40,000
- Rounded to the nearest 1000
- 40,000
- Number before
- 40,020
- Number after
- 40,022
- In binary
1001110001010101
Quick check
What number comes just after 40,021?
Show the answer
40,022
Is 40,021 even or odd?
Show the answer
Odd
What is 40,021 + 10?
Show the answer
40,031
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 40,021 in words?
40,021 is written "forty thousand and twenty-one".
Is 40,021 a prime number?
No. 40,021 is a composite number, because it has more than two factors.
What are the factors of 40,021?
The factors of 40,021 are 1, 31, 1,291 and 40,021.