The number 4749
4749 is a composite number with 4 divisors. Its prime factorisation is 3 × 1583. Divisors (4): 1, 3, 1583, 4749.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 4749: a semiprime: 3 × 1583, the product of two primes.
- 2
4749 is composite. Its prime factorisation is
- 3
The divisors add up to 6336; without 4749 itself that is 1587, so 4749 is deficient (1587 is less than 4749). Euler's totient φ(4749) = 3164 numbers up to 4749 share no factor with it.
- 4
The digits of 4749 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 77 steps to reach 1.
LaTeX source of the formulas on this page
\[ 4749 = 3 \times 1583 \]
4749 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 6336 |
| Euler totient φ(n) | 3164 |
| Square | 22553001 |
| Cube | 107104201749 |
| Square root | 68.912989 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 77 |
| Scientific notation | 4.749 × |
4749 in other forms
| Form | Value |
|---|---|
| In words | four thousand seven hundred and forty-nine |
| Binary (base 2) | 1001010001101 |
| Octal (base 8) | 11215 |
| Hexadecimal (base 16) | 128D |
| Base 3 | 20111220 |
| As time | 4749 seconds = 1 h 19 min 9 s |
Is 4749 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 (4749 ÷ 3 = 1583) | 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 6) | 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 8) | 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 4749 a prime number?
No. 4749 = 3 × 1583, so it is divisible by 3.
What are the factors of 4749?
1, 3, 1583, 4749.
What is 4749 in binary?
1001010001101 (hexadecimal 128D, octal 11215).
What is the square root of 4749?
About 68.9130.
Is 4749 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 4749?
4749 is a semiprime: 3 × 1583, the product of two primes.