The number 42629
42629 is a composite number with 4 divisors. Its prime factorisation is 47 × 907. Divisors (4): 1, 47, 907, 42629.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42629: a semiprime: 47 × 907, the product of two primes.
- 2
42629 is composite. Its prime factorisation is
- 3
The divisors add up to 43584; without 42629 itself that is 955, so 42629 is deficient (955 is less than 42629). Euler's totient φ(42629) = 41676 numbers up to 42629 share no factor with it.
- 4
The digits of 42629 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 88 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42629 = 47 \times 907 \]
42629 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 43584 |
| Euler totient φ(n) | 41676 |
| Square | 1817231641 |
| Cube | 77466767624189 |
| Square root | 206.467915 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 88 |
| Scientific notation | 4.2629 × |
42629 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand six hundred and twenty-nine |
| Binary (base 2) | 1010011010000101 |
| Octal (base 8) | 123205 |
| Hexadecimal (base 16) | A685 |
| Base 3 | 2011110212 |
| As time | 42629 seconds = 11 h 50 min 29 s |
Is 42629 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 2) | 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 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | 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 5) | 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 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42629 a prime number?
No. 42629 = 47 × 907, so it is divisible by 47.
What are the factors of 42629?
1, 47, 907, 42629.
What is 42629 in binary?
1010011010000101 (hexadecimal A685, octal 123205).
What is the square root of 42629?
About 206.4679.
Is 42629 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 42629?
42629 is a semiprime: 47 × 907, the product of two primes.