The number 70749
70749 is a composite number with 12 divisors. Its prime factorisation is × 7 × 1123. Divisors (12): 1, 3, 7, 9, 21, 63, 1123, 3369, 7861, 10107, 23583, 70749.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
70749 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
70749 is composite. Its prime factorisation is
- 3
The divisors add up to 116896; without 70749 itself that is 46147, so 70749 is deficient (46147 is less than 70749). Euler's totient φ(70749) = 40392 numbers up to 70749 share no factor with it.
- 4
The digits of 70749 add up to 27, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 81 steps to reach 1.
LaTeX source of the formulas on this page
\[ 70749 = 3^{2} \times 7 \times 1123 \]70749 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 116896 |
| Euler totient φ(n) | 40392 |
| Square | 5005421001 |
| Cube | 354128530399749 |
| Square root | 265.986842 (= 3√7861) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 81 |
| Scientific notation | 7.0749 × |
70749 in other forms
| Form | Value |
|---|---|
| In words | seventy thousand seven hundred and forty-nine |
| Binary (base 2) | 10001010001011101 |
| Octal (base 8) | 212135 |
| Hexadecimal (base 16) | 1145D |
| Base 3 | 10121001100 |
| As time | 70749 seconds = 19 h 39 min 9 s |
Is 70749 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 (70749 ÷ 3 = 23583) | 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 | Yes (70749 ÷ 7 = 10107) | 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 | Yes (70749 ÷ 9 = 7861) | 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 70749 a prime number?
No. 70749 = × 7 × 1123, so it is divisible by 3.
What are the factors of 70749?
1, 3, 7, 9, 21, 63, 1123, 3369, 7861, 10107, 23583, 70749.
What is 70749 in binary?
10001010001011101 (hexadecimal 1145D, octal 212135).
What is the square root of 70749?
About 265.9868, exactly 3√7861.
Is 70749 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 70749?
It is a composite number with 12 divisors.