Properties of the Number 5805

Five Thousand Eight Hundred Five

Basics

Value: 5804 → 5805 → 5806

Parity: odd

Prime: No

Previous Prime: 5801

Next Prime: 5807

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 43

Divisors: 1, 3, 5, 9, 15, 27, 43, 45, 129, 135

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1011010101101

Octal: 13255

Duodecimal: 3439

Hexadecimal: 16ad

Square: 33698025

Square Root: 76.19055059520177

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

a(n) = 3·n² + 6·n. A67725

Numbers m such that there are precisely 13 groups of order m. A292896

Iterate the map in A006369 starting at 144. A185589

Trajectory of 64 under the map n-> A006369(n). A223083

a(n) = n*(8·n-1). A139274

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..1 introduced in row major order. A206659

a(n) = n*(13·n-3)/2. A186030

G.f.: ∏_k>=1 1/(1 - (9·x)^k)^1/3. A271236

Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k maximal strings of increasing consecutive integers (0<=k<=floor(n/2)). A136123

Pairs of deficient numbers having the same value of σ(k)/k in the order that they are found. A211680