Properties of the Number 11856

Eleven Thousand Eight Hundred Fifty-Six

Basics

Value: 11855 → 11856 → 11857

Parity: even

Prime: No

Previous Prime: 11839

Next Prime: 11863

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ⁴ × 3 × 13 × 19

Divisors: 1, 2, 3, 4, 6, 8, 12, 13, 16, 19

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111001010000

Octal: 27120

Duodecimal: 6A40

Hexadecimal: 2e50

Square: 140564736

Square Root: 108.8852607105296

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

Total number of possible knight moves on an (n+2) X (n+2) chessboard, if the knight is placed anywhere. A35008

Numbers k such that σ(x) = k has exactly 10 solutions. A60666

Numbers of the form p⁴*q·r*s where p, q, r, and s are distinct primes. A179693

θ series of the 42-dimensional lattice of hyper-roots A₅(SU(3)). A287944

T(n,k)=Number of length n 0..k arrays least squares fitting to a zero slope straight line, with a single point taken as having zero slope. A245134

a(n) = n*(n+1)*(11·n +10)/6. A254407

Rounded total surface area of a regular icosahedron with edge length n. A71398

a(n) = ∑_i=0..n digsum₄(i)⁴, where digsum₄(i) = A053737(i). A231667

Column 0 of the matrix logarithm (A111810) of triangle A098539, which shifts columns left and up under matrix square; these terms are the result of multiplying the element in row n by n!. A111811

Sieve performed by successive iterations of steps where step m is: keep m terms, remove the next 4 and repeat; as m = 1,2,3,.. the remaining terms form this sequence. A112562