The number 43421
43421 is a composite number with 4 divisors. Its prime factorisation is 7 × 6203. Divisors (4): 1, 7, 6203, 43421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43421: a semiprime: 7 × 6203, the product of two primes.
- 2
43421 is composite. Its prime factorisation is
- 3
The divisors add up to 49632; without 43421 itself that is 6211, so 43421 is deficient (6211 is less than 43421). Euler's totient φ(43421) = 37212 numbers up to 43421 share no factor with it.
- 4
The digits of 43421 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 207 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43421 = 7 \times 6203 \]
43421 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 49632 |
| Euler totient φ(n) | 37212 |
| Square | 1885383241 |
| Cube | 81865225707461 |
| Square root | 208.377062 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 207 |
| Scientific notation | 4.3421 × |
43421 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand four hundred and twenty-one |
| Binary (base 2) | 1010100110011101 |
| Octal (base 8) | 124635 |
| Hexadecimal (base 16) | A99D |
| Base 3 | 2012120012 |
| As time | 43421 seconds = 12 h 3 min 41 s |
Is 43421 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 1) | 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 | Yes (43421 ÷ 7 = 6203) | 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 1) | 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 43421 a prime number?
No. 43421 = 7 × 6203, so it is divisible by 7.
What are the factors of 43421?
1, 7, 6203, 43421.
What is 43421 in binary?
1010100110011101 (hexadecimal A99D, octal 124635).
What is the square root of 43421?
About 208.3771.
Is 43421 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 43421?
43421 is a semiprime: 7 × 6203, the product of two primes.