The number 49745
49745 is a composite number with 4 divisors. Its prime factorisation is 5 × 9949. Divisors (4): 1, 5, 9949, 49745.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 49745: a semiprime: 5 × 9949, the product of two primes.
- 2
49745 is composite. Its prime factorisation is
- 3
The divisors add up to 59700; without 49745 itself that is 9955, so 49745 is deficient (9955 is less than 49745). Euler's totient φ(49745) = 39792 numbers up to 49745 share no factor with it.
- 4
The digits of 49745 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 96 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49745 = 5 \times 9949 \]
49745 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 59700 |
| Euler totient φ(n) | 39792 |
| Square | 2474565025 |
| Cube | 123097237168625 |
| Square root | 223.035872 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 96 |
| Scientific notation | 4.9745 × |
49745 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand seven hundred and forty-five |
| Binary (base 2) | 1100001001010001 |
| Octal (base 8) | 141121 |
| Hexadecimal (base 16) | C251 |
| Base 3 | 2112020102 |
| As time | 49745 seconds = 13 h 49 min 5 s |
Is 49745 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 | Yes (49745 ÷ 5 = 9949) | 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 5) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 49745 a prime number?
No. 49745 = 5 × 9949, so it is divisible by 5.
What are the factors of 49745?
1, 5, 9949, 49745.
What is 49745 in binary?
1100001001010001 (hexadecimal C251, octal 141121).
What is the square root of 49745?
About 223.0359.
Is 49745 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 49745?
49745 is a semiprime: 5 × 9949, the product of two primes.