The number 17129
17129 is a composite number with 4 divisors. Its prime factorisation is 7 × 2447. Divisors (4): 1, 7, 2447, 17129.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 17129: a semiprime: 7 × 2447, the product of two primes.
- 2
17129 is composite. Its prime factorisation is
- 3
The divisors add up to 19584; without 17129 itself that is 2455, so 17129 is deficient (2455 is less than 17129). Euler's totient φ(17129) = 14676 numbers up to 17129 share no factor with it.
- 4
The digits of 17129 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 79 steps to reach 1.
LaTeX source of the formulas on this page
\[ 17129 = 7 \times 2447 \]
17129 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 19584 |
| Euler totient φ(n) | 14676 |
| Square | 293402641 |
| Cube | 5025693837689 |
| Square root | 130.877806 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 79 |
| Scientific notation | 1.7129 × |
17129 in other forms
| Form | Value |
|---|---|
| In words | seventeen thousand one hundred and twenty-nine |
| Binary (base 2) | 100001011101001 |
| Octal (base 8) | 41351 |
| Hexadecimal (base 16) | 42E9 |
| Base 3 | 212111102 |
| As time | 17129 seconds = 4 h 45 min 29 s |
Is 17129 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 1) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (17129 ÷ 7 = 2447) | 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 1) | 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 9) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 17129 a prime number?
No. 17129 = 7 × 2447, so it is divisible by 7.
What are the factors of 17129?
1, 7, 2447, 17129.
What is 17129 in binary?
100001011101001 (hexadecimal 42E9, octal 41351).
What is the square root of 17129?
About 130.8778.
Is 17129 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 17129?
17129 is a semiprime: 7 × 2447, the product of two primes.