21,426 in words
21,426
twenty-one thousand four hundred twenty-six
21,426 is written twenty-one thousand four hundred twenty-six.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred twenty-sixth
- Expanded form
- 20,000 + 1,000 + 400 + 20 + 6
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 6 | 6 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 3, 6, 3,571, 7,142, 10,713 and 21,426 (8 factors)
- First 10 multiples
- 21,426, 42,852, 64,278, 85,704, 107,130, 128,556, 149,982, 171,408, 192,834, 214,260
- Square
- 21,426 × 21,426 = 459,073,476
- Square root
- ≈ 146.38
- Sum of the digits
- 2 + 1 + 4 + 2 + 6 = 15
- Rounded to the nearest 10
- 21,430
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,425
- Number after
- 21,427
- In binary
101001110110010
Quick check
What number comes just after 21,426?
Show the answer
21,427
Is 21,426 even or odd?
Show the answer
Even
What is 21,426 + 10?
Show the answer
21,436
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 21,426 in words?
21,426 is written "twenty-one thousand four hundred twenty-six".
Is 21,426 a prime number?
No. 21,426 is a composite number, because it has more than two factors.
What are the factors of 21,426?
The factors of 21,426 are 1, 2, 3, 6, 3,571, 7,142, 10,713 and 21,426.