The number 43509
43509 is a composite number with 4 divisors. Its prime factorisation is 3 × 14503. Divisors (4): 1, 3, 14503, 43509.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43509: a semiprime: 3 × 14503, the product of two primes.
- 2
43509 is composite. Its prime factorisation is
- 3
The divisors add up to 58016; without 43509 itself that is 14507, so 43509 is deficient (14507 is less than 43509). Euler's totient φ(43509) = 29004 numbers up to 43509 share no factor with it.
- 4
The digits of 43509 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 70 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43509 = 3 \times 14503 \]
43509 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 58016 |
| Euler totient φ(n) | 29004 |
| Square | 1893033081 |
| Cube | 82363976321229 |
| Square root | 208.588111 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 70 |
| Scientific notation | 4.3509 × |
43509 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand five hundred and nine |
| Binary (base 2) | 1010100111110101 |
| Octal (base 8) | 124765 |
| Hexadecimal (base 16) | A9F5 |
| Base 3 | 2012200110 |
| As time | 43509 seconds = 12 h 5 min 9 s |
Is 43509 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 (43509 ÷ 3 = 14503) | 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 3) | 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 43509 a prime number?
No. 43509 = 3 × 14503, so it is divisible by 3.
What are the factors of 43509?
1, 3, 14503, 43509.
What is 43509 in binary?
1010100111110101 (hexadecimal A9F5, octal 124765).
What is the square root of 43509?
About 208.5881.
Is 43509 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 43509?
43509 is a semiprime: 3 × 14503, the product of two primes.