The number 42671
42671 is a composite number with 4 divisors. Its prime factorisation is 71 × 601. Divisors (4): 1, 71, 601, 42671.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42671: a semiprime: 71 × 601, the product of two primes.
- 2
42671 is composite. Its prime factorisation is
- 3
The divisors add up to 43344; without 42671 itself that is 673, so 42671 is deficient (673 is less than 42671). Euler's totient φ(42671) = 42000 numbers up to 42671 share no factor with it.
- 4
The digits of 42671 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 101 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42671 = 71 \times 601 \]
42671 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 43344 |
| Euler totient φ(n) | 42000 |
| Square | 1820814241 |
| Cube | 77695964477711 |
| Square root | 206.569601 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 101 |
| Scientific notation | 4.2671 × |
42671 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand six hundred and seventy-one |
| Binary (base 2) | 1010011010101111 |
| Octal (base 8) | 123257 |
| Hexadecimal (base 16) | A6AF |
| Base 3 | 2011112102 |
| As time | 42671 seconds = 11 h 51 min 11 s |
Is 42671 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 2) | 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 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42671 a prime number?
No. 42671 = 71 × 601, so it is divisible by 71.
What are the factors of 42671?
1, 71, 601, 42671.
What is 42671 in binary?
1010011010101111 (hexadecimal A6AF, octal 123257).
What is the square root of 42671?
About 206.5696.
Is 42671 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42671?
42671 is a semiprime: 71 × 601, the product of two primes.