The number 71371
71371 is a composite number with 4 divisors. Its prime factorisation is 149 × 479. Divisors (4): 1, 149, 479, 71371.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71371: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 149 × 479, the product of two primes.
- 2
71371 is composite. Its prime factorisation is
- 3
The divisors add up to 72000; without 71371 itself that is 629, so 71371 is deficient (629 is less than 71371). Euler's totient φ(71371) = 70744 numbers up to 71371 share no factor with it.
- 4
The digits of 71371 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 161 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71371 = 149 \times 479 \]
71371 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 72000 |
| Euler totient φ(n) | 70744 |
| Square | 5093819641 |
| Cube | 363551001597811 |
| Square root | 267.153514 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 161 |
| Scientific notation | 7.1371 × |
71371 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand three hundred and seventy-one |
| Binary (base 2) | 10001011011001011 |
| Octal (base 8) | 213313 |
| Hexadecimal (base 16) | 116CB |
| Base 3 | 10121220101 |
| As time | 71371 seconds = 19 h 49 min 31 s |
Is 71371 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 1) | 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 1) | 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 1) | 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 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71371 a prime number?
No. 71371 = 149 × 479, so it is divisible by 149.
What are the factors of 71371?
1, 149, 479, 71371.
What is 71371 in binary?
10001011011001011 (hexadecimal 116CB, octal 213313).
What is the square root of 71371?
About 267.1535.
Is 71371 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 71371?
71371 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 149 × 479, the product of two primes.