The number 42079
42079 is a composite number with 4 divisors. Its prime factorisation is 29 × 1451. Divisors (4): 1, 29, 1451, 42079.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42079: a semiprime: 29 × 1451, the product of two primes.
- 2
42079 is composite. Its prime factorisation is
- 3
The divisors add up to 43560; without 42079 itself that is 1481, so 42079 is deficient (1481 is less than 42079). Euler's totient φ(42079) = 40600 numbers up to 42079 share no factor with it.
- 4
The digits of 42079 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 225 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42079 = 29 \times 1451 \]
42079 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 43560 |
| Euler totient φ(n) | 40600 |
| Square | 1770642241 |
| Cube | 74506854859039 |
| Square root | 205.131665 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 225 |
| Scientific notation | 4.2079 × |
42079 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand and seventy-nine |
| Binary (base 2) | 1010010001011111 |
| Octal (base 8) | 122137 |
| Hexadecimal (base 16) | A45F |
| Base 3 | 2010201111 |
| As time | 42079 seconds = 11 h 41 min 19 s |
Is 42079 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 | No (remainder 1) | 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 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42079 a prime number?
No. 42079 = 29 × 1451, so it is divisible by 29.
What are the factors of 42079?
1, 29, 1451, 42079.
What is 42079 in binary?
1010010001011111 (hexadecimal A45F, octal 122137).
What is the square root of 42079?
About 205.1317.
Is 42079 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 42079?
42079 is a semiprime: 29 × 1451, the product of two primes.