21,449 in words
21,449
twenty-one thousand four hundred and forty-nine
21,449 is written twenty-one thousand four hundred and forty-nine.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred and forty-ninth
- Expanded form
- 20,000 + 1,000 + 400 + 40 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 4 | 40 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 89, 241 and 21,449 (4 factors)
- First 10 multiples
- 21,449, 42,898, 64,347, 85,796, 107,245, 128,694, 150,143, 171,592, 193,041, 214,490
- Square
- 21,449 × 21,449 = 460,059,601
- Square root
- ≈ 146.45
- Sum of the digits
- 2 + 1 + 4 + 4 + 9 = 20
- Rounded to the nearest 10
- 21,450
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,448
- Number after
- 21,450
- In binary
101001111001001
Quick check
What number comes just after 21,449?
Show the answer
21,450
Is 21,449 even or odd?
Show the answer
Odd
What is 21,449 + 10?
Show the answer
21,459
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 21,449 in words?
21,449 is written "twenty-one thousand four hundred and forty-nine".
Is 21,449 a prime number?
No. 21,449 is a composite number, because it has more than two factors.
What are the factors of 21,449?
The factors of 21,449 are 1, 89, 241 and 21,449.