21,441 in words
21,441
twenty-one thousand four hundred forty-one
21,441 is written twenty-one thousand four hundred forty-one.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred forty-first
- Expanded form
- 20,000 + 1,000 + 400 + 40 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 4 | 40 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 7, 21, 1,021, 3,063, 7,147 and 21,441 (8 factors)
- First 10 multiples
- 21,441, 42,882, 64,323, 85,764, 107,205, 128,646, 150,087, 171,528, 192,969, 214,410
- Square
- 21,441 × 21,441 = 459,716,481
- Square root
- ≈ 146.43
- Sum of the digits
- 2 + 1 + 4 + 4 + 1 = 12
- Rounded to the nearest 10
- 21,440
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,440
- Number after
- 21,442
- In binary
101001111000001
Quick check
What number comes just after 21,441?
Show the answer
21,442
Is 21,441 even or odd?
Show the answer
Odd
What is 21,441 + 10?
Show the answer
21,451
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 21,441 in words?
21,441 is written "twenty-one thousand four hundred forty-one".
Is 21,441 a prime number?
No. 21,441 is a composite number, because it has more than two factors.
What are the factors of 21,441?
The factors of 21,441 are 1, 3, 7, 21, 1,021, 3,063, 7,147 and 21,441.