The number 42447
42447 is a composite number with 4 divisors. Its prime factorisation is 3 × 14149. Divisors (4): 1, 3, 14149, 42447.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42447: a semiprime: 3 × 14149, the product of two primes.
- 2
42447 is composite. Its prime factorisation is
- 3
The divisors add up to 56600; without 42447 itself that is 14153, so 42447 is deficient (14153 is less than 42447). Euler's totient φ(42447) = 28296 numbers up to 42447 share no factor with it.
- 4
The digits of 42447 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42447 = 3 \times 14149 \]
42447 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56600 |
| Euler totient φ(n) | 28296 |
| Square | 1801747809 |
| Cube | 76478789248623 |
| Square root | 206.026697 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.2447 × |
42447 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand four hundred and forty-seven |
| Binary (base 2) | 1010010111001111 |
| Octal (base 8) | 122717 |
| Hexadecimal (base 16) | A5CF |
| Base 3 | 2011020010 |
| As time | 42447 seconds = 11 h 47 min 27 s |
Is 42447 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 (42447 ÷ 3 = 14149) | 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 2) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42447 a prime number?
No. 42447 = 3 × 14149, so it is divisible by 3.
What are the factors of 42447?
1, 3, 14149, 42447.
What is 42447 in binary?
1010010111001111 (hexadecimal A5CF, octal 122717).
What is the square root of 42447?
About 206.0267.
Is 42447 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 42447?
42447 is a semiprime: 3 × 14149, the product of two primes.