400,021 in words
400,021
four hundred thousand twenty-one
400,021 is written four hundred thousand twenty-one.
Ways to write it
- As an ordinal
- four hundred thousand twenty-first
- Expanded form
- 400,000 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 4 | 400,000 |
| ten thousands | 0 | 0 |
| thousands | 0 | 0 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 307, 1,303 and 400,021 (4 factors)
- First 10 multiples
- 400,021, 800,042, 1,200,063, 1,600,084, 2,000,105, 2,400,126, 2,800,147, 3,200,168, 3,600,189, 4,000,210
- Square
- 400,021 × 400,021 = 160,016,800,441
- Square root
- ≈ 632.47
- Sum of the digits
- 4 + 0 + 0 + 0 + 2 + 1 = 7
- Rounded to the nearest 10
- 400,020
- Rounded to the nearest 100
- 400,000
- Rounded to the nearest 1000
- 400,000
- Number before
- 400,020
- Number after
- 400,022
- In binary
1100001101010010101
Quick check
What number comes just after 400,021?
Show the answer
400,022
Is 400,021 even or odd?
Show the answer
Odd
What is 400,021 + 10?
Show the answer
400,031
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 400,021 in words?
400,021 is written "four hundred thousand twenty-one".
Is 400,021 a prime number?
No. 400,021 is a composite number, because it has more than two factors.
What are the factors of 400,021?
The factors of 400,021 are 1, 307, 1,303 and 400,021.