The number 46721
46721 is a composite number with 4 divisors. Its prime factorisation is 19 × 2459. Divisors (4): 1, 19, 2459, 46721.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 46721: a semiprime: 19 × 2459, the product of two primes.
- 2
46721 is composite. Its prime factorisation is
- 3
The divisors add up to 49200; without 46721 itself that is 2479, so 46721 is deficient (2479 is less than 46721). Euler's totient φ(46721) = 44244 numbers up to 46721 share no factor with it.
- 4
The digits of 46721 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 106 steps to reach 1.
LaTeX source of the formulas on this page
\[ 46721 = 19 \times 2459 \]
46721 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 49200 |
| Euler totient φ(n) | 44244 |
| Square | 2182851841 |
| Cube | 101985020863361 |
| Square root | 216.150411 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 106 |
| Scientific notation | 4.6721 × |
46721 in other forms
| Form | Value |
|---|---|
| In words | forty-six thousand seven hundred and twenty-one |
| Binary (base 2) | 1011011010000001 |
| Octal (base 8) | 133201 |
| Hexadecimal (base 16) | B681 |
| Base 3 | 2101002102 |
| As time | 46721 seconds = 12 h 58 min 41 s |
Is 46721 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 | 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 2) | 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 46721 a prime number?
No. 46721 = 19 × 2459, so it is divisible by 19.
What are the factors of 46721?
1, 19, 2459, 46721.
What is 46721 in binary?
1011011010000001 (hexadecimal B681, octal 133201).
What is the square root of 46721?
About 216.1504.
Is 46721 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 46721?
46721 is a semiprime: 19 × 2459, the product of two primes.