421,009 in words
421,009
four hundred twenty-one thousand nine
421,009 is written four hundred twenty-one thousand nine.
Ways to write it
- As an ordinal
- four hundred twenty-one thousand ninth
- Expanded form
- 400,000 + 20,000 + 1,000 + 9
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 4 | 400,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 0 | 0 |
| tens | 0 | 0 |
| ones | 9 | 9 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 421,009 (2 factors)
- First 10 multiples
- 421,009, 842,018, 1,263,027, 1,684,036, 2,105,045, 2,526,054, 2,947,063, 3,368,072, 3,789,081, 4,210,090
- Square
- 421,009 × 421,009 = 177,248,578,081
- Square root
- ≈ 648.85
- Sum of the digits
- 4 + 2 + 1 + 0 + 0 + 9 = 16
- Rounded to the nearest 10
- 421,010
- Rounded to the nearest 100
- 421,000
- Rounded to the nearest 1000
- 421,000
- Number before
- 421,008
- Number after
- 421,010
- In binary
1100110110010010001
Quick check
What number comes just after 421,009?
Show the answer
421,010
Is 421,009 even or odd?
Show the answer
Odd
What is 421,009 + 10?
Show the answer
421,019
Practice 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 421,009 in words?
421,009 is written "four hundred twenty-one thousand nine".
Is 421,009 a prime number?
Yes. 421,009 is a prime number: its only factors are 1 and 421,009.
What are the factors of 421,009?
The factors of 421,009 are 1 and 421,009.