Properties of the Number 85791

Eighty-Five Thousand Seven Hundred Ninety-One

Basics

Value: 85790 → 85791 → 85792

Parity: odd

Prime: No

Previous Prime: 85781

Next Prime: 85793

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 28597

Divisors: 1, 3, 28597, 85791

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100111100011111

Octal: 247437

Duodecimal: 41793

Hexadecimal: 14f1f

Square: 7360095681

Square Root: 292.90100716795087

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

Number of quadrilateral regions in an equilateral triangular "frame" of size n (see Comments in A328526 for definition). A333033

Expansion of (1-x)^-1/(1-2·x-2·x²+2·x³). A77847

Index in A375564 where n-th group of successive primes ends. A376196

a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest unused positive number that is coprime to a(n-1) if a(n-1) is prime, otherwise a(n) shares a factor with a(n-1). A375564

Triangle T(n,k) read by rows; given by [0,1,0,1,0,1,0,1,...] δ [1,0,1,1,1,2,1,3,1,4,1,5,...], where δ is the operator defined in A084938. A85791