Properties of the Number 27561

Twenty-Seven Thousand Five Hundred Sixty-One

Basics

Value: 27560 → 27561 → 27562

Parity: odd

Prime: No

Previous Prime: 27551

Next Prime: 27581

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 9187

Divisors: 1, 3, 9187, 27561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110101110101001

Octal: 65651

Duodecimal: 13B49

Hexadecimal: 6ba9

Square: 759608721

Square Root: 166.01505955786058

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

Number of solutions to c(1)*prime(1) + ... + c(n)*prime(n) = 1, where c(i) = +-1 for i > 1, c(1) = 1. A22895

Number of nonempty subsets of {1..n} with mean n/2. A362046

Length of n-th string generated by a Kolakoski(9,1) rule starting with a(1)=1. A95344

a(0) = 2, thereafter a(n+1) is the nearest integer to 4·a(n)/3. A390254

G.f.: ∑_n>=0 ∏_k=1..n (1 - (1-x)^2·k-1)/(1 - x^2·k-1). A207653

Floor(AGM(n², n³)), where AGM denotes the arithmetic-geometric mean. A234362

Composite numbers k such that φ(x) = ψ(k)*φ(k) has no solution. A292714

Positive integers m with m^k - 1 (k = 1,...,13) all practical. A294307

Semiprimes of the form k² + 5. A361696

Number of 4-unbalanced strings of length n (=2ⁿ-A027559(n)). A27561