Properties of the Number 11947

Eleven Thousand Nine Hundred Forty-Seven

Basics

Value: 11946 → 11947 → 11948

Parity: odd

Prime: No

Previous Prime: 11941

Next Prime: 11953

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 13 × 919

Divisors: 1, 13, 919, 11947

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111010101011

Octal: 27253

Duodecimal: 6AB7

Hexadecimal: 2eab

Square: 142730809

Square Root: 109.30233300346337

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

Expansion of g.f. (1 + x + 2·x²)/((1 - x)³*(1 - x³)). A92498

Principal diagonal of the convolution array A213773. A214092

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 934", based on the 5-celled von Neumann neighborhood. A284426

Antidiagonal sums of the convolution array A213783. A213760

a(n) = ∑_k=1..n (-1)^k-1 * binomial(k+3,4) * floor(n/k). A366939

Upper (1,1/3) midsequence of (n²) and (n³); see Comments. A393347

Interprimes (A024675) which are of the form s·prime, s=13. A75288

a(n) = (n/2) * (n³ - 2·n² - 2·n + 5). A242983

Integers m such that A006218(m) is triangular. A263457

G.f. A(x) satisfies: A(x) = A(A(x)²) / (x - x²). A265941