The number 40165
40165 is a composite number with 8 divisors. Its prime factorisation is 5 × 29 × 277. Divisors (8): 1, 5, 29, 145, 277, 1385, 8033, 40165.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40165 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40165 is composite. Its prime factorisation is
- 3
The divisors add up to 50040; without 40165 itself that is 9875, so 40165 is deficient (9875 is less than 40165). Euler's totient φ(40165) = 30912 numbers up to 40165 share no factor with it.
- 4
The digits of 40165 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 67 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40165 = 5 \times 29 \times 277 \]
40165 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 50040 |
| Euler totient φ(n) | 30912 |
| Square | 1613227225 |
| Cube | 64795271492125 |
| Square root | 200.412075 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 67 |
| Scientific notation | 4.0165 × |
40165 in other forms
| Form | Value |
|---|---|
| In words | forty thousand one hundred and sixty-five |
| Binary (base 2) | 1001110011100101 |
| Octal (base 8) | 116345 |
| Hexadecimal (base 16) | 9CE5 |
| Base 3 | 2001002121 |
| As time | 40165 seconds = 11 h 9 min 25 s |
Is 40165 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (40165 ÷ 5 = 8033) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40165 a prime number?
No. 40165 = 5 × 29 × 277, so it is divisible by 5.
What are the factors of 40165?
1, 5, 29, 145, 277, 1385, 8033, 40165.
What is 40165 in binary?
1001110011100101 (hexadecimal 9CE5, octal 116345).
What is the square root of 40165?
About 200.4121.
Is 40165 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 40165?
It is a composite number with 8 divisors.