The number 71013
71013 is a composite number with 4 divisors. Its prime factorisation is 3 × 23671. Divisors (4): 1, 3, 23671, 71013.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71013: a semiprime: 3 × 23671, the product of two primes.
- 2
71013 is composite. Its prime factorisation is
- 3
The divisors add up to 94688; without 71013 itself that is 23675, so 71013 is deficient (23675 is less than 71013). Euler's totient φ(71013) = 47340 numbers up to 71013 share no factor with it.
- 4
The digits of 71013 add up to 12, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 174 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71013 = 3 \times 23671 \]
71013 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 94688 |
| Euler totient φ(n) | 47340 |
| Square | 5042846169 |
| Cube | 358107634999197 |
| Square root | 266.482645 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 174 |
| Scientific notation | 7.1013 × |
71013 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand and thirteen |
| Binary (base 2) | 10001010101100101 |
| Octal (base 8) | 212545 |
| Hexadecimal (base 16) | 11565 |
| Base 3 | 10121102010 |
| As time | 71013 seconds = 19 h 43 min 33 s |
Is 71013 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 (71013 ÷ 3 = 23671) | 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 3) | 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 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 5) | 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 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71013 a prime number?
No. 71013 = 3 × 23671, so it is divisible by 3.
What are the factors of 71013?
1, 3, 23671, 71013.
What is 71013 in binary?
10001010101100101 (hexadecimal 11565, octal 212545).
What is the square root of 71013?
About 266.4826.
Is 71013 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 71013?
71013 is a semiprime: 3 × 23671, the product of two primes.