The number 74542
74542 is a composite number with 16 divisors. Its prime factorisation is 2 × 13 × 47 × 61. Divisors (16): 1, 2, 13, 26, 47, 61, 94, 122, 611, 793, 1222, 1586, 2867, 5734, 37271, 74542.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
74542 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
74542 is composite. Its prime factorisation is
- 3
The divisors add up to 124992; without 74542 itself that is 50450, so 74542 is deficient (50450 is less than 74542). Euler's totient φ(74542) = 33120 numbers up to 74542 share no factor with it.
- 4
The digits of 74542 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74542 = 2 \times 13 \times 47 \times 61 \]
74542 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 124992 |
| Euler totient φ(n) | 33120 |
| Square | 5556509764 |
| Cube | 414193350828088 |
| Square root | 273.023808 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 94 |
| Scientific notation | 7.4542 × |
74542 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand five hundred and forty-two |
| Binary (base 2) | 10010001100101110 |
| Octal (base 8) | 221456 |
| Hexadecimal (base 16) | 1232E |
| Base 3 | 10210020211 |
| As time | 74542 seconds = 20 h 42 min 22 s |
Is 74542 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (74542 ÷ 2 = 37271) | 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 6) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 6) | 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 74542 a prime number?
No. 74542 = 2 × 13 × 47 × 61, so it is divisible by 2.
What are the factors of 74542?
1, 2, 13, 26, 47, 61, 94, 122, 611, 793, 1222, 1586, 2867, 5734, 37271, 74542.
What is 74542 in binary?
10010001100101110 (hexadecimal 1232E, octal 221456).
What is the square root of 74542?
About 273.0238.
Is 74542 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 74542?
It is a composite number with 16 divisors.