The number 72449
72449 is a composite number with 4 divisors. Its prime factorisation is 13 × 5573. Divisors (4): 1, 13, 5573, 72449.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 72449: a semiprime: 13 × 5573, the product of two primes.
- 2
72449 is composite. Its prime factorisation is
- 3
The divisors add up to 78036; without 72449 itself that is 5587, so 72449 is deficient (5587 is less than 72449). Euler's totient φ(72449) = 66864 numbers up to 72449 share no factor with it.
- 4
The digits of 72449 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 42 steps to reach 1.
LaTeX source of the formulas on this page
\[ 72449 = 13 \times 5573 \]
72449 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 78036 |
| Euler totient φ(n) | 66864 |
| Square | 5248857601 |
| Cube | 380274484334849 |
| Square root | 269.163519 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 42 |
| Scientific notation | 7.2449 × |
72449 in other forms
| Form | Value |
|---|---|
| In words | seventy-two thousand four hundred and forty-nine |
| Binary (base 2) | 10001101100000001 |
| Octal (base 8) | 215401 |
| Hexadecimal (base 16) | 11B01 |
| Base 3 | 10200101022 |
| As time | 72449 seconds = 20 h 7 min 29 s |
Is 72449 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 | No (remainder 4) | 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 6) | 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 8) | 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 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 72449 a prime number?
No. 72449 = 13 × 5573, so it is divisible by 13.
What are the factors of 72449?
1, 13, 5573, 72449.
What is 72449 in binary?
10001101100000001 (hexadecimal 11B01, octal 215401).
What is the square root of 72449?
About 269.1635.
Is 72449 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 72449?
72449 is a semiprime: 13 × 5573, the product of two primes.