The number 61243
61243 is a composite number with 8 divisors. Its prime factorisation is 7 × 13 × 673. Divisors (8): 1, 7, 13, 91, 673, 4711, 8749, 61243.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61243 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61243 is composite. Its prime factorisation is
- 3
The divisors add up to 75488; without 61243 itself that is 14245, so 61243 is deficient (14245 is less than 61243). Euler's totient φ(61243) = 48384 numbers up to 61243 share no factor with it.
- 4
The digits of 61243 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 86 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61243 = 7 \times 13 \times 673 \]
61243 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 75488 |
| Euler totient φ(n) | 48384 |
| Square | 3750705049 |
| Cube | 229704429315907 |
| Square root | 247.473231 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 86 |
| Scientific notation | 6.1243 × |
61243 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand two hundred and forty-three |
| Binary (base 2) | 1110111100111011 |
| Octal (base 8) | 167473 |
| Hexadecimal (base 16) | EF3B |
| Base 3 | 10010000021 |
| As time | 61243 seconds = 17 h 0 min 43 s |
Is 61243 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | 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 (61243 ÷ 7 = 8749) | 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 3) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61243 a prime number?
No. 61243 = 7 × 13 × 673, so it is divisible by 7.
What are the factors of 61243?
1, 7, 13, 91, 673, 4711, 8749, 61243.
What is 61243 in binary?
1110111100111011 (hexadecimal EF3B, octal 167473).
What is the square root of 61243?
About 247.4732.
Is 61243 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 61243?
It is a composite number with 8 divisors.