The number 40942
40942 is a composite number with 8 divisors. Its prime factorisation is 2 × 11 × 1861. Divisors (8): 1, 2, 11, 22, 1861, 3722, 20471, 40942.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40942 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40942 is composite. Its prime factorisation is
- 3
The divisors add up to 67032; without 40942 itself that is 26090, so 40942 is deficient (26090 is less than 40942). Euler's totient φ(40942) = 18600 numbers up to 40942 share no factor with it.
- 4
The digits of 40942 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 119 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40942 = 2 \times 11 \times 1861 \]
40942 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 67032 |
| Euler totient φ(n) | 18600 |
| Square | 1676247364 |
| Cube | 68628919576888 |
| Square root | 202.341296 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 119 |
| Scientific notation | 4.0942 × |
40942 in other forms
| Form | Value |
|---|---|
| In words | forty thousand nine hundred and forty-two |
| Binary (base 2) | 1001111111101110 |
| Octal (base 8) | 117756 |
| Hexadecimal (base 16) | 9FEE |
| Base 3 | 2002011101 |
| As time | 40942 seconds = 11 h 22 min 22 s |
Is 40942 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (40942 ÷ 2 = 20471) | 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 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 | Yes (40942 ÷ 11 = 3722) | 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 40942 a prime number?
No. 40942 = 2 × 11 × 1861, so it is divisible by 2.
What are the factors of 40942?
1, 2, 11, 22, 1861, 3722, 20471, 40942.
What is 40942 in binary?
1001111111101110 (hexadecimal 9FEE, octal 117756).
What is the square root of 40942?
About 202.3413.
Is 40942 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 40942?
It is a composite number with 8 divisors.