The number 5671
5671 is a triangular number: 1 + 2 + … + 106 = 5671. Its prime factorisation is 53 × 107. Divisors (4): 1, 53, 107, 5671.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 5671: a triangular number: 1 + 2 + … + 106 = 5671; a semiprime: 53 × 107, the product of two primes.
- 2
5671 is composite. Its prime factorisation is
- 3
The divisors add up to 5832; without 5671 itself that is 161, so 5671 is deficient (161 is less than 5671). Euler's totient φ(5671) = 5512 numbers up to 5671 share no factor with it.
- 4
The digits of 5671 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 80 steps to reach 1.
LaTeX source of the formulas on this page
\[ 5671 = 53 \times 107 \]
5671 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 5832 |
| Euler totient φ(n) | 5512 |
| Square | 32160241 |
| Cube | 182380726711 |
| Square root | 75.306042 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 80 |
| Scientific notation | 5.671 × |
5671 in other forms
| Form | Value |
|---|---|
| In words | five thousand six hundred and seventy-one |
| Binary (base 2) | 1011000100111 |
| Octal (base 8) | 13047 |
| Hexadecimal (base 16) | 1627 |
| Base 3 | 21210001 |
| As time | 5671 seconds = 1 h 34 min 31 s |
Is 5671 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 1) | 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 7) | 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 6) | 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 5671 a prime number?
No. 5671 = 53 × 107, so it is divisible by 53.
What are the factors of 5671?
1, 53, 107, 5671.
What is 5671 in binary?
1011000100111 (hexadecimal 1627, octal 13047).
What is the square root of 5671?
About 75.3060.
Is 5671 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 5671?
5671 is a triangular number: 1 + 2 + … + 106 = 5671; a semiprime: 53 × 107, the product of two primes.