42,121 in words
42,121
forty-two thousand one hundred twenty-one
42,121 is written forty-two thousand one hundred twenty-one.
Ways to write it
- As an ordinal
- forty-two thousand one hundred twenty-first
- Expanded form
- 40,000 + 2,000 + 100 + 20 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 4 | 40,000 |
| thousands | 2 | 2,000 |
| hundreds | 1 | 100 |
| tens | 2 | 20 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 73, 577 and 42,121 (4 factors)
- First 10 multiples
- 42,121, 84,242, 126,363, 168,484, 210,605, 252,726, 294,847, 336,968, 379,089, 421,210
- Square
- 42,121 × 42,121 = 1,774,178,641
- Square root
- ≈ 205.23
- Sum of the digits
- 4 + 2 + 1 + 2 + 1 = 10
- Rounded to the nearest 10
- 42,120
- Rounded to the nearest 100
- 42,100
- Rounded to the nearest 1000
- 42,000
- Number before
- 42,120
- Number after
- 42,122
- In binary
1010010010001001
Quick check
What number comes just after 42,121?
Show the answer
42,122
Is 42,121 even or odd?
Show the answer
Odd
What is 42,121 + 10?
Show the answer
42,131
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 42,121 in words?
42,121 is written "forty-two thousand one hundred twenty-one".
Is 42,121 a prime number?
No. 42,121 is a composite number, because it has more than two factors.
What are the factors of 42,121?
The factors of 42,121 are 1, 73, 577 and 42,121.