Properties of the Number 1285

One Thousand Two Hundred Eighty-Five

Basics

Value: 1284 → 1285 → 1286

Parity: odd

Prime: No

Previous Prime: 1283

Next Prime: 1289

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 257

Divisors: 1, 5, 257, 1285

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000101

Octal: 2405

Duodecimal: 8B1

Hexadecimal: 505

Square: 1651225

Square Root: 35.84689665786984

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: Yes

Fermat Number: No

Cullen Number: No

OEIS Sequences

Moser-de Bruijn sequence: sums of distinct powers of 4. A695

Number of free polyominoes (or square animals) with n cells. A105

Sierpiński's triangle (Pascal's triangle mod 2) converted to decimal. A1317

Sequence and first differences (A030124) together list all positive numbers exactly once. A5228

Number of partitions of n with equal number of even and odd parts. A45931

List of codewords in binary lexicode with Hamming distance 4 written as decimal numbers. A75928

Number of partitions of n into at most 4 parts. A1400

Basis for code in A075928. A75929

Numbers of edges of regular polygons constructible with ruler (or, more precisely, an unmarked straightedge) and compass. A3401

Number of partitions of n in which the greatest part is 4. A26810