The number 1226
1226 is a composite number with 4 divisors. Its prime factorisation is 2 × 613. Divisors (4): 1, 2, 613, 1226.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 1226: a semiprime: 2 × 613, the product of two primes.
- 2
1226 is composite. Its prime factorisation is
- 3
The divisors add up to 1842; without 1226 itself that is 616, so 1226 is deficient (616 is less than 1226). Euler's totient φ(1226) = 612 numbers up to 1226 share no factor with it.
- 4
The digits of 1226 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 39 steps to reach 1.
LaTeX source of the formulas on this page
\[ 1226 = 2 \times 613 \]
1226 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 1842 |
| Euler totient φ(n) | 612 |
| Square | 1503076 |
| Cube | 1842771176 |
| Square root | 35.014283 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 39 |
| Scientific notation | 1.226 × |
1226 in other forms
| Form | Value |
|---|---|
| In words | one thousand two hundred and twenty-six |
| Roman numerals | MCCXXVI |
| Binary (base 2) | 10011001010 |
| Octal (base 8) | 2312 |
| Hexadecimal (base 16) | 4CA |
| Base 3 | 1200102 |
| As time | 1226 seconds = 20 min 26 s |
Is 1226 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (1226 ÷ 2 = 613) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 1226 a prime number?
No. 1226 = 2 × 613, so it is divisible by 2.
What are the factors of 1226?
1, 2, 613, 1226.
What is 1226 in binary?
10011001010 (hexadecimal 4CA, octal 2312).
What is the square root of 1226?
About 35.0143.
What is 1226 in Roman numerals?
MCCXXVI.
Is 1226 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 1226?
1226 is a semiprime: 2 × 613, the product of two primes.