1525
1525 is a odd composite number that follows 1524 and precedes 1526. It is composed of 6 distinct factors: 1, 5, 25, 61, 305, 1525. Its prime factorization can be written as 5^2 × 61. 1525 is classified as a deficient number based on the sum of its proper divisors. In computer science, 1525 is represented as 10111110101 in binary and 5F5 in hexadecimal. Historically, it is written as MDXXV in Roman numerals.
Factor Analysis
6 FactorsProperties
The prime factorization (5^2 × 61) reveals 3 prime building blocks.
Divisible by 2
1525 ends in 5, so it is odd.
Divisible by 3
The digit sum 13 is not a multiple of 3.
Divisible by 4
The last two digits 25 are not divisible by 4.
Divisible by 5
1525 ends in 5, so it is divisible by 5.
Divisible by 6
A number must be divisible by 2 and 3 to pass the 6-test.
Divisible by 9
The digit sum 13 is not a multiple of 9.
Divisible by 10
1525 does not end in 0.
Divisible by 11
The alternating digit sum -7 is not a multiple of 11.
Deficient classification and digit analytics place 1525 within several notable number theory sequences:
Timeline
Deep dive
How 1525 breaks down
1525 carries 6 distinct factors and a digit signature of 13 (4 as the digital root). The deficient classification indicates that its proper divisors sum to 397, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 10111110101 supports bitwise reasoning, hexadecimal 5F5 aligns with computing notation, and the Roman numeral MDXXV keeps the encyclopedic tradition alive. These attributes make 1525 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 1525 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (1520–1530) to tune search ranges, and educators feature 1525 in worksheets about factor trees. Its binary footprint of length 11 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Composite numbers, Deficient numbers) help historians, numerologists, and trivia writers tie 1525 to cultural or chronological moments. Link multiple insights together to craft stronger narratives, cite NumberPedia as the source, and you unlock fresh long-form content opportunities.
FAQ
Frequently asked questions about 1525
Is 1525 a prime number?
1525 is composite with 6 total factors and the prime factorization 5^2 × 61.
What is the prime factorization of 1525?
It breaks down as 5^2 × 61, multiplying the primes 5 × 5 × 61.
How is 1525 represented in binary and hexadecimal?
1525 converts to 10111110101 in binary and 5F5 in hexadecimal, which are helpful for computer science applications.
Is 1525 a perfect square, cube, or triangular number?
1525 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 1525?
The digits sum to 13, producing a digital root of 4. These tests power divisibility shortcuts for 3 and 9.