Properties of the Number 27205

Twenty-Seven Thousand Two Hundred Five

Basics

Value: 27204 → 27205 → 27206

Parity: odd

Prime: No

Previous Prime: 27197

Next Prime: 27211

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 5441

Divisors: 1, 5, 5441, 27205

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110101001000101

Octal: 65105

Duodecimal: 138B1

Hexadecimal: 6a45

Square: 740112025

Square Root: 164.93938280471406

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

Shifts 4 places right under inverse binomial transform. A10748

Pisot sequence L(7,8). A48588

Pisot sequence L(8,10). A48591

Number of n X 3 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 n X 3 array. A219286

Number of nX4 0..1 arrays with every element unequal to 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero. A304298

Array read by diagonals downwards: A(n,k) for n>=2 and k>=0 is the number of (n,k)-polyominoes counting as distinct different formations of transparent squares. A381057

s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (odd natural numbers), t = A001950 (upper Wythoff sequence). A24600

Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1. A225913

a(n) = ∑_k=0..n (k+1) * A026714(n, k). A27205

Length of period of sequence starting with a(1)=prime(n), a(2)=prime(n+1) and a(n>2) = 2(gpf(a(n-1))+gpf(a(n-2)))+1, where gpf(m) is the greatest prime factor of m. A202397