The number 71441
71441 is a composite number with 4 divisors. Its prime factorisation is 199 × 359. Divisors (4): 1, 199, 359, 71441.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71441: a semiprime: 199 × 359, the product of two primes.
- 2
71441 is composite. Its prime factorisation is
- 3
The divisors add up to 72000; without 71441 itself that is 559, so 71441 is deficient (559 is less than 71441). Euler's totient φ(71441) = 70884 numbers up to 71441 share no factor with it.
- 4
The digits of 71441 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
\[ 71441 = 199 \times 359 \]
71441 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 72000 |
| Euler totient φ(n) | 70884 |
| Square | 5103816481 |
| Cube | 364621753219121 |
| Square root | 267.284493 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 99 |
| Scientific notation | 7.1441 × |
71441 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and forty-one |
| Binary (base 2) | 10001011100010001 |
| Octal (base 8) | 213421 |
| Hexadecimal (base 16) | 11711 |
| Base 3 | 10121222222 |
| As time | 71441 seconds = 19 h 50 min 41 s |
Is 71441 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 1) | 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 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 1) | 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 1) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71441 a prime number?
No. 71441 = 199 × 359, so it is divisible by 199.
What are the factors of 71441?
1, 199, 359, 71441.
What is 71441 in binary?
10001011100010001 (hexadecimal 11711, octal 213421).
What is the square root of 71441?
About 267.2845.
Is 71441 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 71441?
71441 is a semiprime: 199 × 359, the product of two primes.