Properties of the Number 11920

Eleven Thousand Nine Hundred Twenty

Basics

Value: 11919 → 11920 → 11921

Parity: even

Prime: No

Previous Prime: 11909

Next Prime: 11923

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ⁴ × 5 × 149

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10111010010000

Octal: 27220

Duodecimal: 6A94

Hexadecimal: 2e90

Square: 142086400

Square Root: 109.17875251164945

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

Convolution of A000203 with itself. A385

T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order. A222794

Expansion of x/((1 - x - x⁴)*(1 - x)²). A145131

Numbers k such that (2^k + k + 1)*2^k - 1 is prime. A201357

Number of nX1 0..3 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order. A222269

E.g.f. satisfies: A'(x) = A(x)⁷ * A(-x)³ with A(0) = 1. A236956

Number of 2 X 2 matrices having all elements in {-n,...n} and determinant 3. A209986

7-step Fibonacci sequence starting with (0,1,0,0,0,0,0). A251714

Number of binary strings of length n that begin with an odd-length palindrome. A254128

Number of cyclic subgroups of the group GL(2, Z(n)), counting conjugates as distinct. A316560