The number 5455
5455 is a composite number with 4 divisors. Its prime factorisation is 5 × 1091. Divisors (4): 1, 5, 1091, 5455.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 5455: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 1091, the product of two primes.
- 2
5455 is composite. Its prime factorisation is
- 3
The divisors add up to 6552; without 5455 itself that is 1097, so 5455 is deficient (1097 is less than 5455). Euler's totient φ(5455) = 4360 numbers up to 5455 share no factor with it.
- 4
The digits of 5455 add up to 19, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 129 steps to reach 1.
LaTeX source of the formulas on this page
\[ 5455 = 5 \times 1091 \]
5455 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 6552 |
| Euler totient φ(n) | 4360 |
| Square | 29757025 |
| Cube | 162324571375 |
| Square root | 73.857972 |
| Digit sum / digital root | 19 / 1 |
| Collatz steps to 1 | 129 |
| Scientific notation | 5.455 × |
5455 in other forms
| Form | Value |
|---|---|
| In words | five thousand four hundred and fifty-five |
| Binary (base 2) | 1010101001111 |
| Octal (base 8) | 12517 |
| Hexadecimal (base 16) | 154F |
| Base 3 | 21111001 |
| As time | 5455 seconds = 1 h 30 min 55 s |
Is 5455 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 1) | 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 | Yes (5455 ÷ 5 = 1091) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 1) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 5455 a prime number?
No. 5455 = 5 × 1091, so it is divisible by 5.
What are the factors of 5455?
1, 5, 1091, 5455.
What is 5455 in binary?
1010101001111 (hexadecimal 154F, octal 12517).
What is the square root of 5455?
About 73.8580.
Is 5455 divisible by 3?
No. Its digits add up to 19, which is not a multiple of 3.
What is special about the number 5455?
5455 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 1091, the product of two primes.