138,021 in words
138,021
one hundred and thirty-eight thousand and twenty-one
138,021 is written one hundred and thirty-eight thousand and twenty-one.
Ways to write it
- As an ordinal
- one hundred and thirty-eight thousand and twenty-first
- Expanded form
- 100,000 + 30,000 + 8,000 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| hundred thousands | 1 | 100,000 |
| ten thousands | 3 | 30,000 |
| thousands | 8 | 8,000 |
| hundreds | 0 | 0 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 3, 13, 39, 3,539, 10,617, 46,007 and 138,021 (8 factors)
- First 10 multiples
- 138,021, 276,042, 414,063, 552,084, 690,105, 828,126, 966,147, 1,104,168, 1,242,189, 1,380,210
- Square
- 138,021 × 138,021 = 19,049,796,441
- Square root
- ≈ 371.51
- Sum of the digits
- 1 + 3 + 8 + 0 + 2 + 1 = 15
- Rounded to the nearest 10
- 138,020
- Rounded to the nearest 100
- 138,000
- Rounded to the nearest 1000
- 138,000
- Number before
- 138,020
- Number after
- 138,022
- In binary
100001101100100101
Quick check
What number comes just after 138,021?
Show the answer
138,022
Is 138,021 even or odd?
Show the answer
Odd
What is 138,021 + 10?
Show the answer
138,031
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 138,021 in words?
138,021 is written "one hundred and thirty-eight thousand and twenty-one".
Is 138,021 a prime number?
No. 138,021 is a composite number, because it has more than two factors.
What are the factors of 138,021?
The factors of 138,021 are 1, 3, 13, 39, 3,539, 10,617, 46,007 and 138,021.