The number 42171
42171 is a composite number with 4 divisors. Its prime factorisation is 3 × 14057. Divisors (4): 1, 3, 14057, 42171.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42171: a semiprime: 3 × 14057, the product of two primes.
- 2
42171 is composite. Its prime factorisation is
- 3
The divisors add up to 56232; without 42171 itself that is 14061, so 42171 is deficient (14061 is less than 42171). Euler's totient φ(42171) = 28112 numbers up to 42171 share no factor with it.
- 4
The digits of 42171 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 80 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42171 = 3 \times 14057 \]
42171 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56232 |
| Euler totient φ(n) | 28112 |
| Square | 1778393241 |
| Cube | 74996621366211 |
| Square root | 205.355789 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 80 |
| Scientific notation | 4.2171 × |
42171 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand one hundred and seventy-one |
| Binary (base 2) | 1010010010111011 |
| Octal (base 8) | 122273 |
| Hexadecimal (base 16) | A4BB |
| Base 3 | 2010211220 |
| As time | 42171 seconds = 11 h 42 min 51 s |
Is 42171 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 (42171 ÷ 3 = 14057) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 3) | 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 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | 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 42171 a prime number?
No. 42171 = 3 × 14057, so it is divisible by 3.
What are the factors of 42171?
1, 3, 14057, 42171.
What is 42171 in binary?
1010010010111011 (hexadecimal A4BB, octal 122273).
What is the square root of 42171?
About 205.3558.
Is 42171 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 42171?
42171 is a semiprime: 3 × 14057, the product of two primes.