The number 91442
91442 is a composite number with 8 divisors. Its prime factorisation is 2 × 13 × 3517. Divisors (8): 1, 2, 13, 26, 3517, 7034, 45721, 91442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
91442 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
91442 is composite. Its prime factorisation is
- 3
The divisors add up to 147756; without 91442 itself that is 56314, so 91442 is deficient (56314 is less than 91442). Euler's totient φ(91442) = 42192 numbers up to 91442 share no factor with it.
- 4
The digits of 91442 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 177 steps to reach 1.
LaTeX source of the formulas on this page
\[ 91442 = 2 \times 13 \times 3517 \]
91442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 147756 |
| Euler totient φ(n) | 42192 |
| Square | 8361639364 |
| Cube | 764605026722888 |
| Square root | 302.393783 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 177 |
| Scientific notation | 9.1442 × |
91442 in other forms
| Form | Value |
|---|---|
| In words | ninety-one thousand four hundred and forty-two |
| Binary (base 2) | 10110010100110010 |
| Octal (base 8) | 262462 |
| Hexadecimal (base 16) | 16532 |
| Base 3 | 11122102202 |
| As time | 91442 seconds = 25 h 24 min 2 s |
Is 91442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (91442 ÷ 2 = 45721) | 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 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 10) | 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 91442 a prime number?
No. 91442 = 2 × 13 × 3517, so it is divisible by 2.
What are the factors of 91442?
1, 2, 13, 26, 3517, 7034, 45721, 91442.
What is 91442 in binary?
10110010100110010 (hexadecimal 16532, octal 262462).
What is the square root of 91442?
About 302.3938.
Is 91442 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 91442?
It is a composite number with 8 divisors.