The number 2942
2942 is a composite number with 4 divisors. Its prime factorisation is 2 × 1471. Divisors (4): 1, 2, 1471, 2942.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 2942: a semiprime: 2 × 1471, the product of two primes.
- 2
2942 is composite. Its prime factorisation is
- 3
The divisors add up to 4416; without 2942 itself that is 1474, so 2942 is deficient (1474 is less than 2942). Euler's totient φ(2942) = 1470 numbers up to 2942 share no factor with it.
- 4
The digits of 2942 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 172 steps to reach 1.
LaTeX source of the formulas on this page
\[ 2942 = 2 \times 1471 \]
2942 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 4416 |
| Euler totient φ(n) | 1470 |
| Square | 8655364 |
| Cube | 25464080888 |
| Square root | 54.240206 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 172 |
| Scientific notation | 2.942 × |
2942 in other forms
| Form | Value |
|---|---|
| In words | two thousand nine hundred and forty-two |
| Roman numerals | MMCMXLII |
| Binary (base 2) | 101101111110 |
| Octal (base 8) | 5576 |
| Hexadecimal (base 16) | B7E |
| Base 3 | 11000222 |
| As time | 2942 seconds = 49 min 2 s |
Is 2942 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (2942 ÷ 2 = 1471) | 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 2) | 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 5) | 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 2942 a prime number?
No. 2942 = 2 × 1471, so it is divisible by 2.
What are the factors of 2942?
1, 2, 1471, 2942.
What is 2942 in binary?
101101111110 (hexadecimal B7E, octal 5576).
What is the square root of 2942?
About 54.2402.
What is 2942 in Roman numerals?
MMCMXLII.
Is 2942 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 2942?
2942 is a semiprime: 2 × 1471, the product of two primes.