The number 11042
11042 is a composite number with 4 divisors. Its prime factorisation is 2 × 5521. Divisors (4): 1, 2, 5521, 11042.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 11042: a semiprime: 2 × 5521, the product of two primes.
- 2
11042 is composite. Its prime factorisation is
- 3
The divisors add up to 16566; without 11042 itself that is 5524, so 11042 is deficient (5524 is less than 11042). Euler's totient φ(11042) = 5520 numbers up to 11042 share no factor with it.
- 4
The digits of 11042 add up to 8, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 130 steps to reach 1.
LaTeX source of the formulas on this page
\[ 11042 = 2 \times 5521 \]
11042 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 16566 |
| Euler totient φ(n) | 5520 |
| Square | 121925764 |
| Cube | 1346304286088 |
| Square root | 105.080921 |
| Digit sum / digital root | 8 / 8 |
| Collatz steps to 1 | 130 |
| Scientific notation | 1.1042 × |
11042 in other forms
| Form | Value |
|---|---|
| In words | eleven thousand and forty-two |
| Binary (base 2) | 10101100100010 |
| Octal (base 8) | 25442 |
| Hexadecimal (base 16) | 2B22 |
| Base 3 | 120010222 |
| As time | 11042 seconds = 3 h 4 min 2 s |
Is 11042 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (11042 ÷ 2 = 5521) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 2) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 11042 a prime number?
No. 11042 = 2 × 5521, so it is divisible by 2.
What are the factors of 11042?
1, 2, 5521, 11042.
What is 11042 in binary?
10101100100010 (hexadecimal 2B22, octal 25442).
What is the square root of 11042?
About 105.0809.
Is 11042 divisible by 3?
No. Its digits add up to 8, which is not a multiple of 3.
What is special about the number 11042?
11042 is a semiprime: 2 × 5521, the product of two primes.