The number 6742
6742 is a composite number with 4 divisors. Its prime factorisation is 2 × 3371. Divisors (4): 1, 2, 3371, 6742.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 6742: a semiprime: 2 × 3371, the product of two primes.
- 2
6742 is composite. Its prime factorisation is
- 3
The divisors add up to 10116; without 6742 itself that is 3374, so 6742 is deficient (3374 is less than 6742). Euler's totient φ(6742) = 3370 numbers up to 6742 share no factor with it.
- 4
The digits of 6742 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 6742 = 2 \times 3371 \]
6742 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 10116 |
| Euler totient φ(n) | 3370 |
| Square | 45454564 |
| Cube | 306454670488 |
| Square root | 82.109683 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 75 |
| Scientific notation | 6.742 × |
6742 in other forms
| Form | Value |
|---|---|
| In words | six thousand seven hundred and forty-two |
| Binary (base 2) | 1101001010110 |
| Octal (base 8) | 15126 |
| Hexadecimal (base 16) | 1A56 |
| Base 3 | 100020201 |
| As time | 6742 seconds = 1 h 52 min 22 s |
Is 6742 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (6742 ÷ 2 = 3371) | 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 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 1) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 6742 a prime number?
No. 6742 = 2 × 3371, so it is divisible by 2.
What are the factors of 6742?
1, 2, 3371, 6742.
What is 6742 in binary?
1101001010110 (hexadecimal 1A56, octal 15126).
What is the square root of 6742?
About 82.1097.
Is 6742 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 6742?
6742 is a semiprime: 2 × 3371, the product of two primes.