The number 6429
6429 is a composite number with 4 divisors. Its prime factorisation is 3 × 2143. Divisors (4): 1, 3, 2143, 6429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 6429: a semiprime: 3 × 2143, the product of two primes.
- 2
6429 is composite. Its prime factorisation is
- 3
The divisors add up to 8576; without 6429 itself that is 2147, so 6429 is deficient (2147 is less than 6429). Euler's totient φ(6429) = 4284 numbers up to 6429 share no factor with it.
- 4
The digits of 6429 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 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 6429 = 3 \times 2143 \]
6429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 8576 |
| Euler totient φ(n) | 4284 |
| Square | 41332041 |
| Cube | 265723691589 |
| Square root | 80.181045 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 168 |
| Scientific notation | 6.429 × |
6429 in other forms
| Form | Value |
|---|---|
| In words | six thousand four hundred and twenty-nine |
| Binary (base 2) | 1100100011101 |
| Octal (base 8) | 14435 |
| Hexadecimal (base 16) | 191D |
| Base 3 | 22211010 |
| As time | 6429 seconds = 1 h 47 min 9 s |
Is 6429 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 (6429 ÷ 3 = 2143) | 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 3) | 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 5) | 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 6429 a prime number?
No. 6429 = 3 × 2143, so it is divisible by 3.
What are the factors of 6429?
1, 3, 2143, 6429.
What is 6429 in binary?
1100100011101 (hexadecimal 191D, octal 14435).
What is the square root of 6429?
About 80.1810.
Is 6429 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 6429?
6429 is a semiprime: 3 × 2143, the product of two primes.