The number 74842
74842 is a composite number with 8 divisors. Its prime factorisation is 2 × 23 × 1627. Divisors (8): 1, 2, 23, 46, 1627, 3254, 37421, 74842.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
74842 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
74842 is composite. Its prime factorisation is
- 3
The divisors add up to 117216; without 74842 itself that is 42374, so 74842 is deficient (42374 is less than 74842). Euler's totient φ(74842) = 35772 numbers up to 74842 share no factor with it.
- 4
The digits of 74842 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 200 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74842 = 2 \times 23 \times 1627 \]
74842 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 117216 |
| Euler totient φ(n) | 35772 |
| Square | 5601324964 |
| Cube | 419214362955688 |
| Square root | 273.572659 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 200 |
| Scientific notation | 7.4842 × |
74842 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand eight hundred and forty-two |
| Binary (base 2) | 10010010001011010 |
| Octal (base 8) | 222132 |
| Hexadecimal (base 16) | 1245A |
| Base 3 | 10210122221 |
| As time | 74842 seconds = 20 h 47 min 22 s |
Is 74842 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (74842 ÷ 2 = 37421) | 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 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 4) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 74842 a prime number?
No. 74842 = 2 × 23 × 1627, so it is divisible by 2.
What are the factors of 74842?
1, 2, 23, 46, 1627, 3254, 37421, 74842.
What is 74842 in binary?
10010010001011010 (hexadecimal 1245A, octal 222132).
What is the square root of 74842?
About 273.5727.
Is 74842 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 74842?
It is a composite number with 8 divisors.