Properties of the Number 1191

One Thousand One Hundred Ninety-One

Basics

Value: 1190 → 1191 → 1192

Parity: odd

Prime: No

Previous Prime: 1187

Next Prime: 1193

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 397

Divisors: 1, 3, 397, 1191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10010100111

Octal: 2247

Duodecimal: 833

Hexadecimal: 4a7

Square: 1418481

Square Root: 34.51086785347479

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

Triangle of Eulerian numbers T(n,k) (n >= 1, 1 <= k <= n) read by rows. A8292

Central polygonal numbers: a(n) = n² - n + 1. A2061

Euler's triangle: triangle of Eulerian numbers T(n,k) (n>=0, 0 <= k <= n) read by rows. A173018

Triangle of Eulerian numbers T(n,k), 0 <= k <= n, read by rows. A123125

Number of partitions of n such that no part is a sum of two or more other parts. A237667

a(n) = 4·n² - 6·n + 3. A54569

Number of strict integer partitions of n whose product of parts is a multiple of n. A379733

Numbers k such that φ(k) = φ(σ(k)). A6872

Number of nonisomorphic cyclic subgroups of general affine group AGL(n,2). A62766

Numbers that can be represented as a string of three or more 1's in a base >= 2. A53696