42,991 in words
42,991
forty-two thousand nine hundred ninety-one
42,991 is written forty-two thousand nine hundred ninety-one.
Ways to write it
- As an ordinal
- forty-two thousand nine hundred ninety-first
- Expanded form
- 40,000 + 2,000 + 900 + 90 + 1
Place value
| Place | Digit | Value |
|---|---|---|
| ten thousands | 4 | 40,000 |
| thousands | 2 | 2,000 |
| hundreds | 9 | 900 |
| tens | 9 | 90 |
| ones | 1 | 1 |
Number facts
- Even or odd
- Odd
- Prime or composite
- Composite
- Factors
- 1, 13, 3,307 and 42,991 (4 factors)
- First 10 multiples
- 42,991, 85,982, 128,973, 171,964, 214,955, 257,946, 300,937, 343,928, 386,919, 429,910
- Square
- 42,991 × 42,991 = 1,848,226,081
- Square root
- ≈ 207.34
- Sum of the digits
- 4 + 2 + 9 + 9 + 1 = 25
- Rounded to the nearest 10
- 42,990
- Rounded to the nearest 100
- 43,000
- Rounded to the nearest 1000
- 43,000
- Number before
- 42,990
- Number after
- 42,992
- In binary
1010011111101111
Quick check
What number comes just after 42,991?
Show the answer
42,992
Is 42,991 even or odd?
Show the answer
Odd
What is 42,991 + 10?
Show the answer
43,001
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 42,991 in words?
42,991 is written "forty-two thousand nine hundred ninety-one".
Is 42,991 a prime number?
No. 42,991 is a composite number, because it has more than two factors.
What are the factors of 42,991?
The factors of 42,991 are 1, 13, 3,307 and 42,991.