The number 42340
42340 is a composite number with 24 divisors. Its prime factorisation is × 5 × 29 × 73. Divisors (24): 1, 2, 4, 5, 10, 20, 29, 58, 73, 116, 145, 146, 290, 292, 365, 580 … 42340.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42340 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42340 is composite. Its prime factorisation is
- 3
The divisors add up to 93240; without 42340 itself that is 50900, so 42340 is abundant (50900 is more than 42340). Euler's totient φ(42340) = 16128 numbers up to 42340 share no factor with it.
- 4
The digits of 42340 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42340 = 2^{2} \times 5 \times 29 \times 73 \]42340 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 93240 |
| Euler totient φ(n) | 16128 |
| Square | 1792675600 |
| Cube | 75901884904000 |
| Square root | 205.766858 (= 2√10585) |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.234 × |
42340 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and forty |
| Binary (base 2) | 1010010101100100 |
| Octal (base 8) | 122544 |
| Hexadecimal (base 16) | A564 |
| Base 3 | 2011002011 |
| As time | 42340 seconds = 11 h 45 min 40 s |
Is 42340 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42340 ÷ 2 = 21170) | 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 | Yes (42340 ÷ 4 = 10585) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (42340 ÷ 5 = 8468) | 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 4) | 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 4) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (42340 ÷ 10 = 4234) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 4) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42340 a prime number?
No. 42340 = × 5 × 29 × 73, so it is divisible by 2.
What are the factors of 42340?
1, 2, 4, 5, 10, 20, 29, 58, 73, 116, 145, 146, 290, 292, 365, 580, 730, 1460, 2117, 4234, 8468, 10585, 21170, 42340.
What is 42340 in binary?
1010010101100100 (hexadecimal A564, octal 122544).
What is the square root of 42340?
About 205.7669, exactly 2√10585.
Is 42340 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 42340?
It is a composite number with 24 divisors.