The number 42046
42046 is a composite number with 4 divisors. Its prime factorisation is 2 × 21023. Divisors (4): 1, 2, 21023, 42046.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42046: a semiprime: 2 × 21023, the product of two primes.
- 2
42046 is composite. Its prime factorisation is
- 3
The divisors add up to 63072; without 42046 itself that is 21026, so 42046 is deficient (21026 is less than 42046). Euler's totient φ(42046) = 21022 numbers up to 42046 share no factor with it.
- 4
The digits of 42046 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 57 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42046 = 2 \times 21023 \]
42046 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63072 |
| Euler totient φ(n) | 21022 |
| Square | 1767866116 |
| Cube | 74331698713336 |
| Square root | 205.051213 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 57 |
| Scientific notation | 4.2046 × |
42046 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand and forty-six |
| Binary (base 2) | 1010010000111110 |
| Octal (base 8) | 122076 |
| Hexadecimal (base 16) | A43E |
| Base 3 | 2010200021 |
| As time | 42046 seconds = 11 h 40 min 46 s |
Is 42046 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42046 ÷ 2 = 21023) | 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 2) | 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 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42046 a prime number?
No. 42046 = 2 × 21023, so it is divisible by 2.
What are the factors of 42046?
1, 2, 21023, 42046.
What is 42046 in binary?
1010010000111110 (hexadecimal A43E, octal 122076).
What is the square root of 42046?
About 205.0512.
Is 42046 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 42046?
42046 is a semiprime: 2 × 21023, the product of two primes.