Properties of the Number 26605

Twenty-Six Thousand Six Hundred Five

Basics

Value: 26604 → 26605 → 26606

Parity: odd

Prime: No

Previous Prime: 26597

Next Prime: 26627

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 17 × 313

Divisors: 1, 5, 17, 85, 313, 1565, 5321, 26605

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110011111101101

Octal: 63755

Duodecimal: 13491

Hexadecimal: 67ed

Square: 707826025

Square Root: 163.11039206623224

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

Numbers of the form p·q*r where p, q, r are distinct primes congruent to 1 mod 4 such that Legendre(p/q) = Legendre(p/r) = Legendre(q/r) = -1. A323271

a(n) = 13·2ⁿ⁺¹ - 19. A275163

Numbers n such that 2·29ⁿ + 1 is prime. A141802

a(n) = ∑_k=0..3 f(n+k)² where f=A130519. A238604

Squared length of diagonal of right trapezoid with three consecutive prime length sides. A360790

Least term in period of continued fraction for sqrt(n) is 9. A31433

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 17. A31605

Matrix inverse of the Narayana triangle A001263. A103364

[3->null]-transform of three-symbol Thue-Morse A026600. A26605