21,425 in words
21,425
twenty-one thousand four hundred twenty-five
21,425 is written twenty-one thousand four hundred twenty-five.
Ways to write it
- As an ordinal
- twenty-one thousand four hundred twenty-fifth
- Expanded form
- 20,000 + 1,000 + 400 + 20 + 5
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 5 | 5 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 5, 25, 857, 4,285 and 21,425 (6 factors)
- First 10 multiples
- 21,425, 42,850, 64,275, 85,700, 107,125, 128,550, 149,975, 171,400, 192,825, 214,250
- Square
- 21,425 × 21,425 = 459,030,625
- Square root
- ≈ 146.37
- Sum of the digits
- 2 + 1 + 4 + 2 + 5 = 14
- Rounded to the nearest 10
- 21,430
- Rounded to the nearest 100
- 21,400
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,424
- Number after
- 21,426
- In binary
101001110110001
Quick check
What number comes just after 21,425?
Show the answer
21,426
Is 21,425 even or odd?
Show the answer
Odd
What is 21,425 + 10?
Show the answer
21,435
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 21,425 in words?
21,425 is written "twenty-one thousand four hundred twenty-five".
Is 21,425 a prime number?
No. 21,425 is a composite number, because it has more than two factors.
What are the factors of 21,425?
The factors of 21,425 are 1, 5, 25, 857, 4,285 and 21,425.