821,420 in words
821,420
eight hundred twenty-one thousand four hundred twenty
821,420 is written eight hundred twenty-one thousand four hundred twenty.
Ways to write it
- As an ordinal
- eight hundred twenty-one thousand four hundred twentieth
- Expanded form
- 800,000 + 20,000 + 1,000 + 400 + 20
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 8 | 800,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 613, 670, 1,226, 1,340, 2,452, 3,065, 6,130, 12,260, 41,071, 82,142, 164,284, 205,355, 410,710 and 821,420 (24 factors)
- First 10 multiples
- 821,420, 1,642,840, 2,464,260, 3,285,680, 4,107,100, 4,928,520, 5,749,940, 6,571,360, 7,392,780, 8,214,200
- Square
- 821,420 × 821,420 = 674,730,816,400
- Square root
- ≈ 906.32
- Sum of the digits
- 8 + 2 + 1 + 4 + 2 + 0 = 17
- Rounded to the nearest 10
- 821,420
- Rounded to the nearest 100
- 821,400
- Rounded to the nearest 1000
- 821,000
- Number before
- 821,419
- Number after
- 821,421
- In binary
11001000100010101100
Quick check
What number comes just after 821,420?
Show the answer
821,421
Is 821,420 even or odd?
Show the answer
Even
What is 821,420 + 10?
Show the answer
821,430
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 821,420 in words?
821,420 is written "eight hundred twenty-one thousand four hundred twenty".
Is 821,420 a prime number?
No. 821,420 is a composite number, because it has more than two factors.
What are the factors of 821,420?
The factors of 821,420 are 1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 613, 670, 1,226, 1,340, 2,452, 3,065, 6,130, 12,260, 41,071, 82,142, 164,284, 205,355, 410,710 and 821,420.