2961
2961 is a odd composite number that follows 2960 and precedes 2962. It is composed of 12 distinct factors: 1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961. Its prime factorization can be written as 3^2 × 7 × 47. 2961 is classified as a deficient number based on the sum of its proper divisors. In computer science, 2961 is represented as 101110010001 in binary and B91 in hexadecimal. Historically, it is written as MMCMLXI in Roman numerals.
Factor Analysis
12 FactorsProperties
The prime factorization (3^2 × 7 × 47) reveals 4 prime building blocks.
Divisible by 2
2961 ends in 1, so it is odd.
Divisible by 3
The digit sum 18 is a multiple of 3.
Divisible by 4
The last two digits 61 are not divisible by 4.
Divisible by 5
2961 does not end in 0 or 5.
Divisible by 6
A number must be divisible by 2 and 3 to pass the 6-test.
Divisible by 9
The digit sum 18 is a multiple of 9.
Divisible by 10
2961 does not end in 0.
Divisible by 11
The alternating digit sum -2 is not a multiple of 11.
Deficient classification and digit analytics place 2961 within several notable number theory sequences:
Timeline
Deep dive
How 2961 breaks down
2961 carries 12 distinct factors and a digit signature of 18 (9 as the digital root). The deficient classification indicates that its proper divisors sum to 2031, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 101110010001 supports bitwise reasoning, hexadecimal B91 aligns with computing notation, and the Roman numeral MMCMLXI keeps the encyclopedic tradition alive. These attributes make 2961 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 2961 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (2956–2966) to tune search ranges, and educators feature 2961 in worksheets about factor trees. Its binary footprint of length 12 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 2961 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 2961
Is 2961 a prime number?
2961 is composite with 12 total factors and the prime factorization 3^2 × 7 × 47.
What is the prime factorization of 2961?
It breaks down as 3^2 × 7 × 47, multiplying the primes 3 × 3 × 7 × 47.
How is 2961 represented in binary and hexadecimal?
2961 converts to 101110010001 in binary and B91 in hexadecimal, which are helpful for computer science applications.
Is 2961 a perfect square, cube, or triangular number?
2961 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 2961?
The digits sum to 18, producing a digital root of 9. These tests power divisibility shortcuts for 3 and 9.