The number 13849
13849 is a composite number with 4 divisors. Its prime factorisation is 11 × 1259. Divisors (4): 1, 11, 1259, 13849.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 13849: a semiprime: 11 × 1259, the product of two primes.
- 2
13849 is composite. Its prime factorisation is
- 3
The divisors add up to 15120; without 13849 itself that is 1271, so 13849 is deficient (1271 is less than 13849). Euler's totient φ(13849) = 12580 numbers up to 13849 share no factor with it.
- 4
The digits of 13849 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 89 steps to reach 1.
LaTeX source of the formulas on this page
\[ 13849 = 11 \times 1259 \]
13849 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 15120 |
| Euler totient φ(n) | 12580 |
| Square | 191794801 |
| Cube | 2656166199049 |
| Square root | 117.681774 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 89 |
| Scientific notation | 1.3849 × |
13849 in other forms
| Form | Value |
|---|---|
| In words | thirteen thousand eight hundred and forty-nine |
| Binary (base 2) | 11011000011001 |
| Octal (base 8) | 33031 |
| Hexadecimal (base 16) | 3619 |
| Base 3 | 200222221 |
| As time | 13849 seconds = 3 h 50 min 49 s |
Is 13849 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 | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | 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 | Yes (13849 ÷ 11 = 1259) | 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 13849 a prime number?
No. 13849 = 11 × 1259, so it is divisible by 11.
What are the factors of 13849?
1, 11, 1259, 13849.
What is 13849 in binary?
11011000011001 (hexadecimal 3619, octal 33031).
What is the square root of 13849?
About 117.6818.
Is 13849 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 13849?
13849 is a semiprime: 11 × 1259, the product of two primes.