421,440 in words
421,440
four hundred twenty-one thousand four hundred forty
421,440 is written four hundred twenty-one thousand four hundred forty.
Ways to write it
- As an ordinal
- four hundred twenty-one thousand four hundred fortieth
- Expanded form
- 400,000 + 20,000 + 1,000 + 400 + 40
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 4 | 400,000 |
| ten thousands | 2 | 20,000 |
| thousands | 1 | 1,000 |
| hundreds | 4 | 400 |
| tens | 4 | 40 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 56 factors: too many to list
- First 10 multiples
- 421,440, 842,880, 1,264,320, 1,685,760, 2,107,200, 2,528,640, 2,950,080, 3,371,520, 3,792,960, 4,214,400
- Square
- 421,440 × 421,440 = 177,611,673,600
- Square root
- ≈ 649.18
- Sum of the digits
- 4 + 2 + 1 + 4 + 4 + 0 = 15
- Rounded to the nearest 10
- 421,440
- Rounded to the nearest 100
- 421,400
- Rounded to the nearest 1000
- 421,000
- Number before
- 421,439
- Number after
- 421,441
- In binary
1100110111001000000
Quick check
What number comes just after 421,440?
Show the answer
421,441
Is 421,440 even or odd?
Show the answer
Even
What is 421,440 + 10?
Show the answer
421,450
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 421,440 in words?
421,440 is written "four hundred twenty-one thousand four hundred forty".
Is 421,440 a prime number?
No. 421,440 is a composite number, because it has more than two factors.