The number 42427
42427 is a composite number with 16 divisors. Its prime factorisation is 7 × 11 × 19 × 29. Divisors (16): 1, 7, 11, 19, 29, 77, 133, 203, 209, 319, 551, 1463, 2233, 3857, 6061, 42427.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42427: a Harshad number: divisible by its digit sum 19.
- 2
42427 is composite. Its prime factorisation is
- 3
The divisors add up to 57600; without 42427 itself that is 15173, so 42427 is deficient (15173 is less than 42427). Euler's totient φ(42427) = 30240 numbers up to 42427 share no factor with it.
- 4
The digits of 42427 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 132 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42427 = 7 \times 11 \times 19 \times 29 \]
42427 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 57600 |
| Euler totient φ(n) | 30240 |
| Square | 1800050329 |
| Cube | 76370735308483 |
| Square root | 205.978154 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 132 |
| Scientific notation | 4.2427 × |
42427 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand four hundred and twenty-seven |
| Binary (base 2) | 1010010110111011 |
| Octal (base 8) | 122673 |
| Hexadecimal (base 16) | A5BB |
| Base 3 | 2011012101 |
| As time | 42427 seconds = 11 h 47 min 7 s |
Is 42427 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 3) | 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42427 ÷ 7 = 6061) | 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 3) | 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 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (42427 ÷ 11 = 3857) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42427 a prime number?
No. 42427 = 7 × 11 × 19 × 29, so it is divisible by 7.
What are the factors of 42427?
1, 7, 11, 19, 29, 77, 133, 203, 209, 319, 551, 1463, 2233, 3857, 6061, 42427.
What is 42427 in binary?
1010010110111011 (hexadecimal A5BB, octal 122673).
What is the square root of 42427?
About 205.9782.
Is 42427 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 42427?
42427 is a Harshad number: divisible by its digit sum 19.