The number 42069
42069 is a composite number with 8 divisors. Its prime factorisation is 3 × 37 × 379. Divisors (8): 1, 3, 37, 111, 379, 1137, 14023, 42069.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42069 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42069 is composite. Its prime factorisation is
- 3
The divisors add up to 57760; without 42069 itself that is 15691, so 42069 is deficient (15691 is less than 42069). Euler's totient φ(42069) = 27216 numbers up to 42069 share no factor with it.
- 4
The digits of 42069 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42069 = 3 \times 37 \times 379 \]
42069 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 57760 |
| Euler totient φ(n) | 27216 |
| Square | 1769800761 |
| Cube | 74453748214509 |
| Square root | 205.107289 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2069 × |
42069 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand and sixty-nine |
| Binary (base 2) | 1010010001010101 |
| Octal (base 8) | 122125 |
| Hexadecimal (base 16) | A455 |
| Base 3 | 2010201010 |
| As time | 42069 seconds = 11 h 41 min 9 s |
Is 42069 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 | Yes (42069 ÷ 3 = 14023) | 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 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42069 a prime number?
No. 42069 = 3 × 37 × 379, so it is divisible by 3.
What are the factors of 42069?
1, 3, 37, 111, 379, 1137, 14023, 42069.
What is 42069 in binary?
1010010001010101 (hexadecimal A455, octal 122125).
What is the square root of 42069?
About 205.1073.
Is 42069 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 42069?
It is a composite number with 8 divisors.