The number 42799
42799 is a composite number with 4 divisors. Its prime factorisation is 127 × 337. Divisors (4): 1, 127, 337, 42799.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42799: a semiprime: 127 × 337, the product of two primes.
- 2
42799 is composite. Its prime factorisation is
- 3
The divisors add up to 43264; without 42799 itself that is 465, so 42799 is deficient (465 is less than 42799). Euler's totient φ(42799) = 42336 numbers up to 42799 share no factor with it.
- 4
The digits of 42799 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 194 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42799 = 127 \times 337 \]
42799 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 43264 |
| Euler totient φ(n) | 42336 |
| Square | 1831754401 |
| Cube | 78397256608399 |
| Square root | 206.879192 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 194 |
| Scientific notation | 4.2799 × |
42799 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand seven hundred and ninety-nine |
| Binary (base 2) | 1010011100101111 |
| Octal (base 8) | 123457 |
| Hexadecimal (base 16) | A72F |
| Base 3 | 2011201011 |
| As time | 42799 seconds = 11 h 53 min 19 s |
Is 42799 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42799 a prime number?
No. 42799 = 127 × 337, so it is divisible by 127.
What are the factors of 42799?
1, 127, 337, 42799.
What is 42799 in binary?
1010011100101111 (hexadecimal A72F, octal 123457).
What is the square root of 42799?
About 206.8792.
Is 42799 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 42799?
42799 is a semiprime: 127 × 337, the product of two primes.