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Properties of the Number 11866

Eleven Thousand Eight Hundred Sixty-Six

Basics

Value: 11865 → 11866 → 11867

Parity: even

Prime: No

Previous Prime: 11863

Next Prime: 11867

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 17 × 349

Divisors: 1, 2, 17, 34, 349, 698, 5933, 11866

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111001011010

Octal: 27132

Duodecimal: 6A4A

Hexadecimal: 2e5a

Square: 140801956

Square Root: 108.93117092916977

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

Numbers k such that 6k - 5k-1 is prime. A93713
Number of n-uniform tilings. A68599
T(n,k)=Number of triangular nXnXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor, and containing the value n(n+1)/2-k-1. A211904
a(0)=0, a(1)=0; for n>1, a(n) = a(n-1) + (n-2)*a(n-2) + 1. A186739
a(n+1) = a(n) + floor(a(n)/5) with a(0)=5. A182306
Number of n X 2 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero. A230893
Conjectured number of irreducible multiple ζ values of depth 8 and weight 2n+22. A22496
Number of triangular nXnXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor, and containing the value n(n+1)/2-3. A211900
Number of diagonal dissections of a convex (n+8)-gon into n+1 regions. A33280
a(n) = floor(n*(n-1)/13). A11866