The number 47042
47042 is a composite number with 8 divisors. Its prime factorisation is 2 × 43 × 547. Divisors (8): 1, 2, 43, 86, 547, 1094, 23521, 47042.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47042 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47042 is composite. Its prime factorisation is
- 3
The divisors add up to 72336; without 47042 itself that is 25294, so 47042 is deficient (25294 is less than 47042). Euler's totient φ(47042) = 22932 numbers up to 47042 share no factor with it.
- 4
The digits of 47042 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 145 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47042 = 2 \times 43 \times 547 \]
47042 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 72336 |
| Euler totient φ(n) | 22932 |
| Square | 2212949764 |
| Cube | 104101582798088 |
| Square root | 216.891678 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 145 |
| Scientific notation | 4.7042 × |
47042 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand and forty-two |
| Binary (base 2) | 1011011111000010 |
| Octal (base 8) | 133702 |
| Hexadecimal (base 16) | B7C2 |
| Base 3 | 2101112022 |
| As time | 47042 seconds = 13 h 4 min 2 s |
Is 47042 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47042 ÷ 2 = 23521) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47042 a prime number?
No. 47042 = 2 × 43 × 547, so it is divisible by 2.
What are the factors of 47042?
1, 2, 43, 86, 547, 1094, 23521, 47042.
What is 47042 in binary?
1011011111000010 (hexadecimal B7C2, octal 133702).
What is the square root of 47042?
About 216.8917.
Is 47042 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 47042?
It is a composite number with 8 divisors.