The number 71429
71429 is the 7075th prime number. Its only divisors are 1 and 71429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71429: the 7075th prime number.
- 2
71429 is prime, so its only factors are 1 and 71429. It is the 7075th prime; the next prime is 71437 and the one before is 71419.
- 3
The divisors add up to 71430; without 71429 itself that is 1, so 71429 is deficient (1 is less than 71429). Euler's totient φ(71429) = 71428 numbers up to 71429 share no factor with it.
- 4
The digits of 71429 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 99 steps to reach 1.
71429 at a glance
| Property | Value |
|---|---|
| Type | prime |
| Number of divisors | 2 |
| Sum of divisors | 71430 |
| Euler totient φ(n) | 71428 |
| Square | 5102102041 |
| Cube | 364438046686589 |
| Square root | 267.262044 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 99 |
| Scientific notation | 7.1429 × |
71429 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and twenty-nine |
| Binary (base 2) | 10001011100000101 |
| Octal (base 8) | 213405 |
| Hexadecimal (base 16) | 11705 |
| Base 3 | 10121222112 |
| As time | 71429 seconds = 19 h 50 min 29 s |
Is 71429 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 | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | 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 6) | 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 71429 a prime number?
Yes. 71429 is divisible only by 1 and itself.
What are the factors of 71429?
1, 71429.
What is 71429 in binary?
10001011100000101 (hexadecimal 11705, octal 213405).
What is the square root of 71429?
About 267.2620.
Is 71429 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 71429?
71429 is the 7075th prime number.