The number 74445
74445 is a composite number with 16 divisors. Its prime factorisation is 3 × 5 × 7 × 709. Divisors (16): 1, 3, 5, 7, 15, 21, 35, 105, 709, 2127, 3545, 4963, 10635, 14889, 24815, 74445.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
74445 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
74445 is composite. Its prime factorisation is
- 3
The divisors add up to 136320; without 74445 itself that is 61875, so 74445 is deficient (61875 is less than 74445). Euler's totient φ(74445) = 33984 numbers up to 74445 share no factor with it.
- 4
The digits of 74445 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 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74445 = 3 \times 5 \times 7 \times 709 \]
74445 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 136320 |
| Euler totient φ(n) | 33984 |
| Square | 5542058025 |
| Cube | 412578509671125 |
| Square root | 272.846110 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 94 |
| Scientific notation | 7.4445 × |
74445 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand four hundred and forty-five |
| Binary (base 2) | 10010001011001101 |
| Octal (base 8) | 221315 |
| Hexadecimal (base 16) | 122CD |
| Base 3 | 10210010020 |
| As time | 74445 seconds = 20 h 40 min 45 s |
Is 74445 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 (74445 ÷ 3 = 24815) | 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 (74445 ÷ 5 = 14889) | 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 (74445 ÷ 7 = 10635) | 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 5) | 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 74445 a prime number?
No. 74445 = 3 × 5 × 7 × 709, so it is divisible by 3.
What are the factors of 74445?
1, 3, 5, 7, 15, 21, 35, 105, 709, 2127, 3545, 4963, 10635, 14889, 24815, 74445.
What is 74445 in binary?
10010001011001101 (hexadecimal 122CD, octal 221315).
What is the square root of 74445?
About 272.8461.
Is 74445 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 74445?
It is a composite number with 16 divisors.