2,421 in words
2,421
two thousand four hundred and twenty-one
2,421 is written two thousand four hundred and twenty-one.
Ways to write it
- As an ordinal
- two thousand four hundred and twenty-first
- Roman numeral
- MMCDXXI
- Expanded form
- 2,000 + 400 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 2 | 2,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 9, 269, 807 and 2,421 (6 factors)
- First 10 multiples
- 2,421, 4,842, 7,263, 9,684, 12,105, 14,526, 16,947, 19,368, 21,789, 24,210
- Square
- 2,421 × 2,421 = 5,861,241
- Square root
- ≈ 49.20
- Sum of the digits
- 2 + 4 + 2 + 1 = 9
- Rounded to the nearest 10
- 2,420
- Rounded to the nearest 100
- 2,400
- Rounded to the nearest 1000
- 2,000
- Number before
- 2,420
- Number after
- 2,422
- In binary
100101110101
Quick check
What number comes just after 2,421?
Show the answer
2,422
Is 2,421 even or odd?
Show the answer
Odd
What is 2,421 + 10?
Show the answer
2,431
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 2,421 in words?
2,421 is written "two thousand four hundred and twenty-one".
Is 2,421 a prime number?
No. 2,421 is a composite number, because it has more than two factors.
What are the factors of 2,421?
The factors of 2,421 are 1, 3, 9, 269, 807 and 2,421.
How do you write 2,421 in Roman numerals?
2,421 in Roman numerals is MMCDXXI.