1,321 in words
1,321
one thousand three hundred and twenty-one
1,321 is written one thousand three hundred and twenty-one.
Ways to write it
- As an ordinal
- one thousand three hundred and twenty-first
- Roman numeral
- MCCCXXI
- Expanded form
- 1,000 + 300 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| thousands | 1 | 1,000 |
| hundreds | 3 | 300 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 1,321 (2 factors)
- First 10 multiples
- 1,321, 2,642, 3,963, 5,284, 6,605, 7,926, 9,247, 10,568, 11,889, 13,210
- Square
- 1,321 × 1,321 = 1,745,041
- Square root
- ≈ 36.35
- Sum of the digits
- 1 + 3 + 2 + 1 = 7
- Rounded to the nearest 10
- 1,320
- Rounded to the nearest 100
- 1,300
- Rounded to the nearest 1000
- 1,000
- Number before
- 1,320
- Number after
- 1,322
- In binary
10100101001
Quick check
What number comes just after 1,321?
Show the answer
1,322
Is 1,321 even or odd?
Show the answer
Odd
What is 1,321 + 10?
Show the answer
1,331
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 1,321 in words?
1,321 is written "one thousand three hundred and twenty-one".
Is 1,321 a prime number?
Yes. 1,321 is a prime number: its only factors are 1 and 1,321.
What are the factors of 1,321?
The factors of 1,321 are 1 and 1,321.
How do you write 1,321 in Roman numerals?
1,321 in Roman numerals is MCCCXXI.