The number 74642
74642 is a composite number with 4 divisors. Its prime factorisation is 2 × 37321. Divisors (4): 1, 2, 37321, 74642.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 74642: a semiprime: 2 × 37321, the product of two primes.
- 2
74642 is composite. Its prime factorisation is
- 3
The divisors add up to 111966; without 74642 itself that is 37324, so 74642 is deficient (37324 is less than 74642). Euler's totient φ(74642) = 37320 numbers up to 74642 share no factor with it.
- 4
The digits of 74642 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74642 = 2 \times 37321 \]
74642 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 111966 |
| Euler totient φ(n) | 37320 |
| Square | 5571428164 |
| Cube | 415862541017288 |
| Square root | 273.206881 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 125 |
| Scientific notation | 7.4642 × |
74642 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand six hundred and forty-two |
| Binary (base 2) | 10010001110010010 |
| Octal (base 8) | 221622 |
| Hexadecimal (base 16) | 12392 |
| Base 3 | 10210101112 |
| As time | 74642 seconds = 20 h 44 min 2 s |
Is 74642 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (74642 ÷ 2 = 37321) | 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 5) | 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 7) | 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 74642 a prime number?
No. 74642 = 2 × 37321, so it is divisible by 2.
What are the factors of 74642?
1, 2, 37321, 74642.
What is 74642 in binary?
10010001110010010 (hexadecimal 12392, octal 221622).
What is the square root of 74642?
About 273.2069.
Is 74642 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 74642?
74642 is a semiprime: 2 × 37321, the product of two primes.