Properties of the Number 5287

Five Thousand Two Hundred Eighty-Seven

Basics

Value: 5286 → 5287 → 5288

Parity: odd

Prime: No

Previous Prime: 5281

Next Prime: 5297

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 17 × 311

Divisors: 1, 17, 311, 5287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1010010100111

Octal: 12247

Duodecimal: 3087

Hexadecimal: 14a7

Square: 27952369

Square Root: 72.71175970914196

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: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = a(n-1) + a(m) for n >= 4, where m = 2^p+1 + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1, a(2) = 3, and a(3) = 1. A50057

Numbers k that are the products of two distinct primes such that 2·k-1, 4·k-3, 8·k-7 and 16·k-15 are also products of two distinct primes. A177213

T(n,k)=Number of nXk 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors. A183554

Write 0, 1, 2, 3, 4, ... in a triangular spiral, then a(n) is the sequence found by reading the terms along the line from 0 in the direction 0, 7, ... A62725

a(1) = 393; for n > 1, a(n) = a(n-1) + 1 + sum of distinct prime factors of a(n-1) that are < a(n-1). edit. A105210

The y member of the positive proper fundamental solution (x = x1(n), y = y1(n)) of the first class for the Pell equation x² - D(n)*y² = +8 for odd D(n) = A263012(n). A264350

Numbers k such that N = (35k)⁶ is a twin rank (A002822: 6N +- 1 are twin primes). A326235

Concatenation of first two digits and last two digits of n-th Mersenne prime A000668(n). A138863

Coefficients in the expansion of 1/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = 7/5. A279779

Number of proper factorizations of the numbers with a record number of proper factorizations. A33834