The number 71342
71342 is a composite number with 4 divisors. Its prime factorisation is 2 × 35671. Divisors (4): 1, 2, 35671, 71342.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71342: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 35671, the product of two primes.
- 2
71342 is composite. Its prime factorisation is
- 3
The divisors add up to 107016; without 71342 itself that is 35674, so 71342 is deficient (35674 is less than 71342). Euler's totient φ(71342) = 35670 numbers up to 71342 share no factor with it.
- 4
The digits of 71342 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 99 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71342 = 2 \times 35671 \]
71342 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 107016 |
| Euler totient φ(n) | 35670 |
| Square | 5089680964 |
| Cube | 363108019333688 |
| Square root | 267.099232 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 99 |
| Scientific notation | 7.1342 × |
71342 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand three hundred and forty-two |
| Binary (base 2) | 10001011010101110 |
| Octal (base 8) | 213256 |
| Hexadecimal (base 16) | 116AE |
| Base 3 | 10121212022 |
| As time | 71342 seconds = 19 h 49 min 2 s |
Is 71342 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (71342 ÷ 2 = 35671) | 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 2) | 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71342 a prime number?
No. 71342 = 2 × 35671, so it is divisible by 2.
What are the factors of 71342?
1, 2, 35671, 71342.
What is 71342 in binary?
10001011010101110 (hexadecimal 116AE, octal 213256).
What is the square root of 71342?
About 267.0992.
Is 71342 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 71342?
71342 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 35671, the product of two primes.