1421 in Roman Numerals
1421
MC (subtracted)DXXI
one thousand four hundred twenty-one
How MCDXXI is formed
| Place | Value | Symbols |
|---|---|---|
| Thousands | 1000 | M |
| Hundreds | 400 | C (subtracted)D |
| Tens | 20 | XX |
| Units | 1 | I |
| Total | 1421 | MCDXXI |
MCDXXI is written one place at a time, from the largest to the smallest: M (1000) + CD (400) + XX (20) + I (1) = 1421.
CD is the only subtraction: the C before the D takes away 100, so CD = 400.
Common mistakes
Wrong: MCCCCXXI
Why isn't 1421 written as MCCCCXXI?
A symbol can't be repeated four times in a row. 400 is CD (500 − 100), not CCCC, so 1421 is MCDXXI.
Numbers near 1421
Properties of 1421
- Prime factors
- 7² × 29
- Divisors
- 1, 7, 29, 49, 203, 1421
- Even or odd
- Odd
- Prime number
- No
- Letters in MCDXXI
- 6
1,421,000 in Roman numerals
With a bar over it (vinculum), M̅C̅D̅X̅X̅I̅ means 1421 × 1,000 = 1,421,000. How Roman numerals work