The number 49105
49105 is a composite number with 16 divisors. Its prime factorisation is 5 × 7 × 23 × 61. Divisors (16): 1, 5, 7, 23, 35, 61, 115, 161, 305, 427, 805, 1403, 2135, 7015, 9821, 49105.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
49105 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
49105 is composite. Its prime factorisation is
- 3
The divisors add up to 71424; without 49105 itself that is 22319, so 49105 is deficient (22319 is less than 49105). Euler's totient φ(49105) = 31680 numbers up to 49105 share no factor with it.
- 4
The digits of 49105 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 127 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49105 = 5 \times 7 \times 23 \times 61 \]
49105 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 71424 |
| Euler totient φ(n) | 31680 |
| Square | 2411301025 |
| Cube | 118406936832625 |
| Square root | 221.596480 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 127 |
| Scientific notation | 4.9105 × |
49105 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand one hundred and five |
| Binary (base 2) | 1011111111010001 |
| Octal (base 8) | 137721 |
| Hexadecimal (base 16) | BFD1 |
| Base 3 | 2111100201 |
| As time | 49105 seconds = 13 h 38 min 25 s |
Is 49105 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 | Yes (49105 ÷ 5 = 9821) | 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 | Yes (49105 ÷ 7 = 7015) | 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 1) | 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 1) | 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 49105 a prime number?
No. 49105 = 5 × 7 × 23 × 61, so it is divisible by 5.
What are the factors of 49105?
1, 5, 7, 23, 35, 61, 115, 161, 305, 427, 805, 1403, 2135, 7015, 9821, 49105.
What is 49105 in binary?
1011111111010001 (hexadecimal BFD1, octal 137721).
What is the square root of 49105?
About 221.5965.
Is 49105 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 49105?
It is a composite number with 16 divisors.