The number 76742
76742 is a composite number with 4 divisors. Its prime factorisation is 2 × 38371. Divisors (4): 1, 2, 38371, 76742.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 76742: a semiprime: 2 × 38371, the product of two primes.
- 2
76742 is composite. Its prime factorisation is
- 3
The divisors add up to 115116; without 76742 itself that is 38374, so 76742 is deficient (38374 is less than 76742). Euler's totient φ(76742) = 38370 numbers up to 76742 share no factor with it.
- 4
The digits of 76742 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 76742 = 2 \times 38371 \]
76742 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 115116 |
| Euler totient φ(n) | 38370 |
| Square | 5889334564 |
| Cube | 451959313110488 |
| Square root | 277.023465 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 125 |
| Scientific notation | 7.6742 × |
76742 in other forms
| Form | Value |
|---|---|
| In words | seventy-six thousand seven hundred and forty-two |
| Binary (base 2) | 10010101111000110 |
| Octal (base 8) | 225706 |
| Hexadecimal (base 16) | 12BC6 |
| Base 3 | 10220021022 |
| As time | 76742 seconds = 21 h 19 min 2 s |
Is 76742 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (76742 ÷ 2 = 38371) | 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 6) | 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 6) | 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 76742 a prime number?
No. 76742 = 2 × 38371, so it is divisible by 2.
What are the factors of 76742?
1, 2, 38371, 76742.
What is 76742 in binary?
10010101111000110 (hexadecimal 12BC6, octal 225706).
What is the square root of 76742?
About 277.0235.
Is 76742 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 76742?
76742 is a semiprime: 2 × 38371, the product of two primes.