16,421 in words
16,421
sixteen thousand four hundred and twenty-one
16,421 is written sixteen thousand four hundred and twenty-one.
Ways to write it
- As an ordinal
- sixteen thousand four hundred and twenty-first
- Expanded form
- 10,000 + 6,000 + 400 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 1 | 10,000 |
| thousands | 6 | 6,000 |
| hundreds | 4 | 400 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Prime
- Factors
- 1 and 16,421 (2 factors)
- First 10 multiples
- 16,421, 32,842, 49,263, 65,684, 82,105, 98,526, 114,947, 131,368, 147,789, 164,210
- Square
- 16,421 × 16,421 = 269,649,241
- Square root
- ≈ 128.14
- Sum of the digits
- 1 + 6 + 4 + 2 + 1 = 14
- Rounded to the nearest 10
- 16,420
- Rounded to the nearest 100
- 16,400
- Rounded to the nearest 1000
- 16,000
- Number before
- 16,420
- Number after
- 16,422
- In binary
100000000100101
Quick check
What number comes just after 16,421?
Show the answer
16,422
Is 16,421 even or odd?
Show the answer
Odd
What is 16,421 + 10?
Show the answer
16,431
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 16,421 in words?
16,421 is written "sixteen thousand four hundred and twenty-one".
Is 16,421 a prime number?
Yes. 16,421 is a prime number: its only factors are 1 and 16,421.
What are the factors of 16,421?
The factors of 16,421 are 1 and 16,421.