The number 14721
14721 is a composite number with 8 divisors. Its prime factorisation is 3 × 7 × 701. Divisors (8): 1, 3, 7, 21, 701, 2103, 4907, 14721.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
14721 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
14721 is composite. Its prime factorisation is
- 3
The divisors add up to 22464; without 14721 itself that is 7743, so 14721 is deficient (7743 is less than 14721). Euler's totient φ(14721) = 8400 numbers up to 14721 share no factor with it.
- 4
The digits of 14721 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 164 steps to reach 1.
LaTeX source of the formulas on this page
\[ 14721 = 3 \times 7 \times 701 \]
14721 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 22464 |
| Euler totient φ(n) | 8400 |
| Square | 216707841 |
| Cube | 3190156127361 |
| Square root | 121.330128 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 164 |
| Scientific notation | 1.4721 × |
14721 in other forms
| Form | Value |
|---|---|
| In words | fourteen thousand seven hundred and twenty-one |
| Binary (base 2) | 11100110000001 |
| Octal (base 8) | 34601 |
| Hexadecimal (base 16) | 3981 |
| Base 3 | 202012020 |
| As time | 14721 seconds = 4 h 5 min 21 s |
Is 14721 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 (14721 ÷ 3 = 4907) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (14721 ÷ 7 = 2103) | 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 6) | 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 3) | 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 14721 a prime number?
No. 14721 = 3 × 7 × 701, so it is divisible by 3.
What are the factors of 14721?
1, 3, 7, 21, 701, 2103, 4907, 14721.
What is 14721 in binary?
11100110000001 (hexadecimal 3981, octal 34601).
What is the square root of 14721?
About 121.3301.
Is 14721 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 14721?
It is a composite number with 8 divisors.