Properties of the Number 11286

Eleven Thousand Two Hundred Eighty-Six

Basics

Value: 11285 → 11286 → 11287

Parity: even

Prime: No

Previous Prime: 11279

Next Prime: 11287

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 11 × 19

Divisors: 1, 2, 3, 6, 9, 11, 18, 19, 22, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10110000010110

Octal: 26026

Duodecimal: 6646

Hexadecimal: 2c16

Square: 127373796

Square Root: 106.23558725775464

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

18-gonal (or octadecagonal) numbers: a(n) = n*(8·n-7). A51870

a(n) = n*(31·n-1)/2. A22288

a(n) = ∑_{k=0..floor(n/2)} T(n-k,k), T given by A026769. A26779

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order. A252861

Row sums of triangle A134464. A134465

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384574. A384582

Left edge of the triangle in A033291. A192735

Expansion of (∏_j>=1 (1-(-x)^j) - 1)¹⁹ in powers of x. A47644

a(n) = A088314(n) - A000009(n). A88571

Triangle of coefficients of polynomials v(n,x) jointly generated with A208751; see the Formula section. A208752