The number 42321
42321 is a composite number with 4 divisors. Its prime factorisation is 3 × 14107. Divisors (4): 1, 3, 14107, 42321.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42321: a semiprime: 3 × 14107, the product of two primes.
- 2
42321 is composite. Its prime factorisation is
- 3
The divisors add up to 56432; without 42321 itself that is 14111, so 42321 is deficient (14111 is less than 42321). Euler's totient φ(42321) = 28212 numbers up to 42321 share no factor with it.
- 4
The digits of 42321 add up to 12, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 132 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42321 = 3 \times 14107 \]
42321 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 56432 |
| Euler totient φ(n) | 28212 |
| Square | 1791067041 |
| Cube | 75799748242161 |
| Square root | 205.720684 |
| Digit sum / digital root | 12 / 3 |
| Collatz steps to 1 | 132 |
| Scientific notation | 4.2321 × |
42321 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and twenty-one |
| Binary (base 2) | 1010010101010001 |
| Octal (base 8) | 122521 |
| Hexadecimal (base 16) | A551 |
| Base 3 | 2011001110 |
| As time | 42321 seconds = 11 h 45 min 21 s |
Is 42321 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 (42321 ÷ 3 = 14107) | 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 1) | 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 1) | 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 1) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42321 a prime number?
No. 42321 = 3 × 14107, so it is divisible by 3.
What are the factors of 42321?
1, 3, 14107, 42321.
What is 42321 in binary?
1010010101010001 (hexadecimal A551, octal 122521).
What is the square root of 42321?
About 205.7207.
Is 42321 divisible by 3?
Yes. Its digits add up to 12, a multiple of 3.
What is special about the number 42321?
42321 is a semiprime: 3 × 14107, the product of two primes.