21,237 in words
21,237
twenty-one thousand two hundred thirty-seven
21,237 is written twenty-one thousand two hundred thirty-seven.
Ways to write it
- As an ordinal
- twenty-one thousand two hundred thirty-seventh
- Expanded form
- 20,000 + 1,000 + 200 + 30 + 7
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 2 | 200 |
| tens | 3 | 30 |
| ones | 7 | 7 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 7,079 and 21,237 (4 factors)
- First 10 multiples
- 21,237, 42,474, 63,711, 84,948, 106,185, 127,422, 148,659, 169,896, 191,133, 212,370
- Square
- 21,237 × 21,237 = 451,010,169
- Square root
- ≈ 145.73
- Sum of the digits
- 2 + 1 + 2 + 3 + 7 = 15
- Rounded to the nearest 10
- 21,240
- Rounded to the nearest 100
- 21,200
- Rounded to the nearest 1000
- 21,000
- Number before
- 21,236
- Number after
- 21,238
- In binary
101001011110101
Quick check
What number comes just after 21,237?
Show the answer
21,238
Is 21,237 even or odd?
Show the answer
Odd
What is 21,237 + 10?
Show the answer
21,247
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 21,237 in words?
21,237 is written "twenty-one thousand two hundred thirty-seven".
Is 21,237 a prime number?
No. 21,237 is a composite number, because it has more than two factors.
What are the factors of 21,237?
The factors of 21,237 are 1, 3, 7,079 and 21,237.