The number 16429
16429 is a composite number with 4 divisors. Its prime factorisation is 7 × 2347. Divisors (4): 1, 7, 2347, 16429.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 16429: a semiprime: 7 × 2347, the product of two primes.
- 2
16429 is composite. Its prime factorisation is
- 3
The divisors add up to 18784; without 16429 itself that is 2355, so 16429 is deficient (2355 is less than 16429). Euler's totient φ(16429) = 14076 numbers up to 16429 share no factor with it.
- 4
The digits of 16429 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 40 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16429 = 7 \times 2347 \]
16429 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 18784 |
| Euler totient φ(n) | 14076 |
| Square | 269912041 |
| Cube | 4434384921589 |
| Square root | 128.175661 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 40 |
| Scientific notation | 1.6429 × |
16429 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand four hundred and twenty-nine |
| Binary (base 2) | 100000000101101 |
| Octal (base 8) | 40055 |
| Hexadecimal (base 16) | 402D |
| Base 3 | 211112111 |
| As time | 16429 seconds = 4 h 33 min 49 s |
Is 16429 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (16429 ÷ 7 = 2347) | 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 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 16429 a prime number?
No. 16429 = 7 × 2347, so it is divisible by 7.
What are the factors of 16429?
1, 7, 2347, 16429.
What is 16429 in binary?
100000000101101 (hexadecimal 402D, octal 40055).
What is the square root of 16429?
About 128.1757.
Is 16429 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 16429?
16429 is a semiprime: 7 × 2347, the product of two primes.