840,421 in words
840,421
eight hundred and forty thousand four hundred and twenty-one
840,421 is written eight hundred and forty thousand four hundred and twenty-one.
Ways to write it
- As an ordinal
- eight hundred and forty thousand four hundred and twenty-first
- Expanded form
- 800,000 + 40,000 + 400 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 8 | 800,000 |
| ten thousands | 4 | 40,000 |
| thousands | 0 | 0 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 53, 101, 157, 5,353, 8,321, 15,857 and 840,421 (8 factors)
- First 10 multiples
- 840,421, 1,680,842, 2,521,263, 3,361,684, 4,202,105, 5,042,526, 5,882,947, 6,723,368, 7,563,789, 8,404,210
- Square
- 840,421 × 840,421 = 706,307,457,241
- Square root
- ≈ 916.74
- Sum of the digits
- 8 + 4 + 0 + 4 + 2 + 1 = 19
- Rounded to the nearest 10
- 840,420
- Rounded to the nearest 100
- 840,400
- Rounded to the nearest 1000
- 840,000
- Number before
- 840,420
- Number after
- 840,422
- In binary
11001101001011100101
Quick check
What number comes just after 840,421?
Show the answer
840,422
Is 840,421 even or odd?
Show the answer
Odd
What is 840,421 + 10?
Show the answer
840,431
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 840,421 in words?
840,421 is written "eight hundred and forty thousand four hundred and twenty-one".
Is 840,421 a prime number?
No. 840,421 is a composite number, because it has more than two factors.
What are the factors of 840,421?
The factors of 840,421 are 1, 53, 101, 157, 5,353, 8,321, 15,857 and 840,421.