The number 42351
42351 is a composite number with 8 divisors. Its prime factorisation is 3 × 19 × 743. Divisors (8): 1, 3, 19, 57, 743, 2229, 14117, 42351.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42351 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42351 is composite. Its prime factorisation is
- 3
The divisors add up to 59520; without 42351 itself that is 17169, so 42351 is deficient (17169 is less than 42351). Euler's totient φ(42351) = 26712 numbers up to 42351 share no factor with it.
- 4
The digits of 42351 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 106 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42351 = 3 \times 19 \times 743 \]
42351 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 59520 |
| Euler totient φ(n) | 26712 |
| Square | 1793607201 |
| Cube | 75961058569551 |
| Square root | 205.793586 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 106 |
| Scientific notation | 4.2351 × |
42351 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and fifty-one |
| Binary (base 2) | 1010010101101111 |
| Octal (base 8) | 122557 |
| Hexadecimal (base 16) | A56F |
| Base 3 | 2011002120 |
| As time | 42351 seconds = 11 h 45 min 51 s |
Is 42351 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 (42351 ÷ 3 = 14117) | 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 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 1) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42351 a prime number?
No. 42351 = 3 × 19 × 743, so it is divisible by 3.
What are the factors of 42351?
1, 3, 19, 57, 743, 2229, 14117, 42351.
What is 42351 in binary?
1010010101101111 (hexadecimal A56F, octal 122557).
What is the square root of 42351?
About 205.7936.
Is 42351 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 42351?
It is a composite number with 8 divisors.