The number 11139
11139 is a composite number with 8 divisors. Its prime factorisation is 3 × 47 × 79. Divisors (8): 1, 3, 47, 79, 141, 237, 3713, 11139.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
11139 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
11139 is composite. Its prime factorisation is
- 3
The divisors add up to 15360; without 11139 itself that is 4221, so 11139 is deficient (4221 is less than 11139). Euler's totient φ(11139) = 7176 numbers up to 11139 share no factor with it.
- 4
The digits of 11139 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 130 steps to reach 1.
LaTeX source of the formulas on this page
\[ 11139 = 3 \times 47 \times 79 \]
11139 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 15360 |
| Euler totient φ(n) | 7176 |
| Square | 124077321 |
| Cube | 1382097278619 |
| Square root | 105.541461 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 130 |
| Scientific notation | 1.1139 × |
11139 in other forms
| Form | Value |
|---|---|
| In words | eleven thousand one hundred and thirty-nine |
| Binary (base 2) | 10101110000011 |
| Octal (base 8) | 25603 |
| Hexadecimal (base 16) | 2B83 |
| Base 3 | 120021120 |
| As time | 11139 seconds = 3 h 5 min 39 s |
Is 11139 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 (11139 ÷ 3 = 3713) | 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 4) | 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 2) | 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 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 11139 a prime number?
No. 11139 = 3 × 47 × 79, so it is divisible by 3.
What are the factors of 11139?
1, 3, 47, 79, 141, 237, 3713, 11139.
What is 11139 in binary?
10101110000011 (hexadecimal 2B83, octal 25603).
What is the square root of 11139?
About 105.5415.
Is 11139 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 11139?
It is a composite number with 8 divisors.