The number 7427
7427 is a composite number with 4 divisors. Its prime factorisation is 7 × 1061. Divisors (4): 1, 7, 1061, 7427.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 7427: a semiprime: 7 × 1061, the product of two primes.
- 2
7427 is composite. Its prime factorisation is
- 3
The divisors add up to 8496; without 7427 itself that is 1069, so 7427 is deficient (1069 is less than 7427). Euler's totient φ(7427) = 6360 numbers up to 7427 share no factor with it.
- 4
The digits of 7427 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 70 steps to reach 1.
LaTeX source of the formulas on this page
\[ 7427 = 7 \times 1061 \]
7427 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 8496 |
| Euler totient φ(n) | 6360 |
| Square | 55160329 |
| Cube | 409675763483 |
| Square root | 86.180044 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 70 |
| Scientific notation | 7.427 × |
7427 in other forms
| Form | Value |
|---|---|
| In words | seven thousand four hundred and twenty-seven |
| Binary (base 2) | 1110100000011 |
| Octal (base 8) | 16403 |
| Hexadecimal (base 16) | 1D03 |
| Base 3 | 101012002 |
| As time | 7427 seconds = 2 h 3 min 47 s |
Is 7427 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 | Yes (7427 ÷ 7 = 1061) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 7427 a prime number?
No. 7427 = 7 × 1061, so it is divisible by 7.
What are the factors of 7427?
1, 7, 1061, 7427.
What is 7427 in binary?
1110100000011 (hexadecimal 1D03, octal 16403).
What is the square root of 7427?
About 86.1800.
Is 7427 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 7427?
7427 is a semiprime: 7 × 1061, the product of two primes.