The number 71201
71201 is a composite number with 4 divisors. Its prime factorisation is 13 × 5477. Divisors (4): 1, 13, 5477, 71201.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71201: a semiprime: 13 × 5477, the product of two primes.
- 2
71201 is composite. Its prime factorisation is
- 3
The divisors add up to 76692; without 71201 itself that is 5491, so 71201 is deficient (5491 is less than 71201). Euler's totient φ(71201) = 65712 numbers up to 71201 share no factor with it.
- 4
The digits of 71201 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 143 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71201 = 13 \times 5477 \]
71201 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 76692 |
| Euler totient φ(n) | 65712 |
| Square | 5069582401 |
| Cube | 360959336533601 |
| Square root | 266.835155 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 143 |
| Scientific notation | 7.1201 × |
71201 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand two hundred and one |
| Binary (base 2) | 10001011000100001 |
| Octal (base 8) | 213041 |
| Hexadecimal (base 16) | 11621 |
| Base 3 | 10121200002 |
| As time | 71201 seconds = 19 h 46 min 41 s |
Is 71201 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 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 4) | 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 1) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71201 a prime number?
No. 71201 = 13 × 5477, so it is divisible by 13.
What are the factors of 71201?
1, 13, 5477, 71201.
What is 71201 in binary?
10001011000100001 (hexadecimal 11621, octal 213041).
What is the square root of 71201?
About 266.8352.
Is 71201 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 71201?
71201 is a semiprime: 13 × 5477, the product of two primes.