The number 61143
61143 is a composite number with 8 divisors. Its prime factorisation is 3 × 89 × 229. Divisors (8): 1, 3, 89, 229, 267, 687, 20381, 61143.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61143 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61143 is composite. Its prime factorisation is
- 3
The divisors add up to 82800; without 61143 itself that is 21657, so 61143 is deficient (21657 is less than 61143). Euler's totient φ(61143) = 40128 numbers up to 61143 share no factor with it.
- 4
The digits of 61143 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 73 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61143 = 3 \times 89 \times 229 \]
61143 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 82800 |
| Euler totient φ(n) | 40128 |
| Square | 3738466449 |
| Cube | 228581054091207 |
| Square root | 247.271106 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 73 |
| Scientific notation | 6.1143 × |
61143 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand one hundred and forty-three |
| Binary (base 2) | 1110111011010111 |
| Octal (base 8) | 167327 |
| Hexadecimal (base 16) | EED7 |
| Base 3 | 10002212120 |
| As time | 61143 seconds = 16 h 59 min 3 s |
Is 61143 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 (61143 ÷ 3 = 20381) | 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 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61143 a prime number?
No. 61143 = 3 × 89 × 229, so it is divisible by 3.
What are the factors of 61143?
1, 3, 89, 229, 267, 687, 20381, 61143.
What is 61143 in binary?
1110111011010111 (hexadecimal EED7, octal 167327).
What is the square root of 61143?
About 247.2711.
Is 61143 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 61143?
It is a composite number with 8 divisors.