The number 71427
71427 is a composite number with 8 divisors. Its prime factorisation is 3 × 29 × 821. Divisors (8): 1, 3, 29, 87, 821, 2463, 23809, 71427.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
71427 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
71427 is composite. Its prime factorisation is
- 3
The divisors add up to 98640; without 71427 itself that is 27213, so 71427 is deficient (27213 is less than 71427). Euler's totient φ(71427) = 45920 numbers up to 71427 share no factor with it.
- 4
The digits of 71427 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71427 = 3 \times 29 \times 821 \]
71427 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 98640 |
| Euler totient φ(n) | 45920 |
| Square | 5101816329 |
| Cube | 364407434931483 |
| Square root | 267.258302 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 125 |
| Scientific notation | 7.1427 × |
71427 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and twenty-seven |
| Binary (base 2) | 10001011100000011 |
| Octal (base 8) | 213403 |
| Hexadecimal (base 16) | 11703 |
| Base 3 | 10121222110 |
| As time | 71427 seconds = 19 h 50 min 27 s |
Is 71427 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 (71427 ÷ 3 = 23809) | 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 2) | 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 6) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71427 a prime number?
No. 71427 = 3 × 29 × 821, so it is divisible by 3.
What are the factors of 71427?
1, 3, 29, 87, 821, 2463, 23809, 71427.
What is 71427 in binary?
10001011100000011 (hexadecimal 11703, octal 213403).
What is the square root of 71427?
About 267.2583.
Is 71427 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 71427?
It is a composite number with 8 divisors.