The number 42539
42539 is a composite number with 8 divisors. Its prime factorisation is 7 × 59 × 103. Divisors (8): 1, 7, 59, 103, 413, 721, 6077, 42539.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42539 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42539 is composite. Its prime factorisation is
- 3
The divisors add up to 49920; without 42539 itself that is 7381, so 42539 is deficient (7381 is less than 42539). Euler's totient φ(42539) = 35496 numbers up to 42539 share no factor with it.
- 4
The digits of 42539 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42539 = 7 \times 59 \times 103 \]
42539 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 49920 |
| Euler totient φ(n) | 35496 |
| Square | 1809566521 |
| Cube | 76977150236819 |
| Square root | 206.249848 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2539 × |
42539 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand five hundred and thirty-nine |
| Binary (base 2) | 1010011000101011 |
| Octal (base 8) | 123053 |
| Hexadecimal (base 16) | A62B |
| Base 3 | 2011100112 |
| As time | 42539 seconds = 11 h 48 min 59 s |
Is 42539 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 2) | 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 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42539 ÷ 7 = 6077) | 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 5) | 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 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42539 a prime number?
No. 42539 = 7 × 59 × 103, so it is divisible by 7.
What are the factors of 42539?
1, 7, 59, 103, 413, 721, 6077, 42539.
What is 42539 in binary?
1010011000101011 (hexadecimal A62B, octal 123053).
What is the square root of 42539?
About 206.2498.
Is 42539 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 42539?
It is a composite number with 8 divisors.