The number 71471
71471 is a twin prime (71471 and 71473 are both prime) and the 7079th prime number. Its only divisors are 1 and 71471.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71471: a twin prime (71471 and 71473 are both prime); the 7079th prime number.
- 2
71471 is prime, so its only factors are 1 and 71471. It is the 7079th prime; the next prime is 71473 and the one before is 71453.
- 3
The divisors add up to 71472; without 71471 itself that is 1, so 71471 is deficient (1 is less than 71471). Euler's totient φ(71471) = 71470 numbers up to 71471 share no factor with it.
- 4
The digits of 71471 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 73 steps to reach 1.
71471 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 71472 |
| Euler totient φ(n) | 71470 |
| Square | 5108103841 |
| Cube | 365081289620111 |
| Square root | 267.340607 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 73 |
| Scientific notation | 7.1471 × |
71471 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and seventy-one |
| Binary (base 2) | 10001011100101111 |
| Octal (base 8) | 213457 |
| Hexadecimal (base 16) | 1172F |
| Base 3 | 10122001002 |
| As time | 71471 seconds = 19 h 51 min 11 s |
Is 71471 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 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71471 a prime number?
Yes. 71471 is divisible only by 1 and itself.
What are the factors of 71471?
1, 71471.
What is 71471 in binary?
10001011100101111 (hexadecimal 1172F, octal 213457).
What is the square root of 71471?
About 267.3406.
Is 71471 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 71471?
71471 is a twin prime (71471 and 71473 are both prime); the 7079th prime number.