121,840 in words
121,840
one hundred twenty-one thousand eight hundred forty
121,840 is written one hundred twenty-one thousand eight hundred forty.
Ways to write it
- As an ordinal
- one hundred twenty-one thousand eight hundred fortieth
- Expanded form
- 100,000 + 20,000 + 1,000 + 800 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 1 | 100,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 8 | 800 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1,523, 3,046, 6,092, 7,615, 12,184, 15,230, 24,368, 30,460, 60,920 and 121,840 (20 factors)
- First 10 multiples
- 121,840, 243,680, 365,520, 487,360, 609,200, 731,040, 852,880, 974,720, 1,096,560, 1,218,400
- Square
- 121,840 × 121,840 = 14,844,985,600
- Square root
- ≈ 349.06
- Sum of the digits
- 1 + 2 + 1 + 8 + 4 + 0 = 16
- Rounded to the nearest 10
- 121,840
- Rounded to the nearest 100
- 121,800
- Rounded to the nearest 1000
- 122,000
- Number before
- 121,839
- Number after
- 121,841
- In binary
11101101111110000
Quick check
What number comes just after 121,840?
Show the answer
121,841
Is 121,840 even or odd?
Show the answer
Even
What is 121,840 + 10?
Show the answer
121,850
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 121,840 in words?
121,840 is written "one hundred twenty-one thousand eight hundred forty".
Is 121,840 a prime number?
No. 121,840 is a composite number, because it has more than two factors.
What are the factors of 121,840?
The factors of 121,840 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1,523, 3,046, 6,092, 7,615, 12,184, 15,230, 24,368, 30,460, 60,920 and 121,840.