The number 42026
42026 is a composite number with 4 divisors. Its prime factorisation is 2 × 21013. Divisors (4): 1, 2, 21013, 42026.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42026: a semiprime: 2 × 21013, the product of two primes.
- 2
42026 is composite. Its prime factorisation is
- 3
The divisors add up to 63042; without 42026 itself that is 21016, so 42026 is deficient (21016 is less than 42026). Euler's totient φ(42026) = 21012 numbers up to 42026 share no factor with it.
- 4
The digits of 42026 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 31 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42026 = 2 \times 21013 \]
42026 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63042 |
| Euler totient φ(n) | 21012 |
| Square | 1766184676 |
| Cube | 74225677193576 |
| Square root | 205.002439 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 31 |
| Scientific notation | 4.2026 × |
42026 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand and twenty-six |
| Binary (base 2) | 1010010000101010 |
| Octal (base 8) | 122052 |
| Hexadecimal (base 16) | A42A |
| Base 3 | 2010122112 |
| As time | 42026 seconds = 11 h 40 min 26 s |
Is 42026 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42026 ÷ 2 = 21013) | 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 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 2) | 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 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42026 a prime number?
No. 42026 = 2 × 21013, so it is divisible by 2.
What are the factors of 42026?
1, 2, 21013, 42026.
What is 42026 in binary?
1010010000101010 (hexadecimal A42A, octal 122052).
What is the square root of 42026?
About 205.0024.
Is 42026 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 42026?
42026 is a semiprime: 2 × 21013, the product of two primes.