The number 15423
15423 is a composite number with 8 divisors. Its prime factorisation is 3 × 53 × 97. Divisors (8): 1, 3, 53, 97, 159, 291, 5141, 15423.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
15423 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
15423 is composite. Its prime factorisation is
- 3
The divisors add up to 21168; without 15423 itself that is 5745, so 15423 is deficient (5745 is less than 15423). Euler's totient φ(15423) = 9984 numbers up to 15423 share no factor with it.
- 4
The digits of 15423 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 133 steps to reach 1.
LaTeX source of the formulas on this page
\[ 15423 = 3 \times 53 \times 97 \]
15423 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 21168 |
| Euler totient φ(n) | 9984 |
| Square | 237868929 |
| Cube | 3668652491967 |
| Square root | 124.189372 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 133 |
| Scientific notation | 1.5423 × |
15423 in other forms
| Form | Value |
|---|---|
| In words | fifteen thousand four hundred and twenty-three |
| Binary (base 2) | 11110000111111 |
| Octal (base 8) | 36077 |
| Hexadecimal (base 16) | 3C3F |
| Base 3 | 210011020 |
| As time | 15423 seconds = 4 h 17 min 3 s |
Is 15423 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 (15423 ÷ 3 = 5141) | 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 3) | 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 | 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 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 15423 a prime number?
No. 15423 = 3 × 53 × 97, so it is divisible by 3.
What are the factors of 15423?
1, 3, 53, 97, 159, 291, 5141, 15423.
What is 15423 in binary?
11110000111111 (hexadecimal 3C3F, octal 36077).
What is the square root of 15423?
About 124.1894.
Is 15423 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 15423?
It is a composite number with 8 divisors.