The number 42279
42279 is a composite number with 8 divisors. Its prime factorisation is 3 × 17 × 829. Divisors (8): 1, 3, 17, 51, 829, 2487, 14093, 42279.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42279 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42279 is composite. Its prime factorisation is
- 3
The divisors add up to 59760; without 42279 itself that is 17481, so 42279 is deficient (17481 is less than 42279). Euler's totient φ(42279) = 26496 numbers up to 42279 share no factor with it.
- 4
The digits of 42279 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42279 = 3 \times 17 \times 829 \]
42279 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 59760 |
| Euler totient φ(n) | 26496 |
| Square | 1787513841 |
| Cube | 75574297683639 |
| Square root | 205.618579 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2279 × |
42279 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand two hundred and seventy-nine |
| Binary (base 2) | 1010010100100111 |
| Octal (base 8) | 122447 |
| Hexadecimal (base 16) | A527 |
| Base 3 | 2010222220 |
| As time | 42279 seconds = 11 h 44 min 39 s |
Is 42279 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 | Yes (42279 ÷ 3 = 14093) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 6) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42279 a prime number?
No. 42279 = 3 × 17 × 829, so it is divisible by 3.
What are the factors of 42279?
1, 3, 17, 51, 829, 2487, 14093, 42279.
What is 42279 in binary?
1010010100100111 (hexadecimal A527, octal 122447).
What is the square root of 42279?
About 205.6186.
Is 42279 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 42279?
It is a composite number with 8 divisors.