Properties of the Number 26681

Twenty-Six Thousand Six Hundred Eighty-One

Basics

Value: 26680 → 26681 → 26682

Parity: odd

Prime: Yes

Previous Prime: 26669

Next Prime: 26683

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 26681

Divisors: 1, 26681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100000111001

Octal: 64071

Duodecimal: 13535

Hexadecimal: 6839

Square: 711875761

Square Root: 163.3431969810803

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

Primes of the form j² + (j+1)². A27862

Initial term in sequence of four consecutive primes separated by 3 consecutive differences each <= 6 (i.e., when d = 2, 4 or 6) and forming pattern = [2, 4, 6]; short notation = [246] d-pattern. A78847

Primes p such that p, p+6, p+12, p+18 are all primes. A23271

Primes p such that the polynomial x² + x + p generates only primes for x = 0, ..., 4. A187057

Primes p such that the polynomial x² + x + p generates only primes for x = 1..7. A187060

Primes p such that the polynomial x² + x + p generates only primes for x = 1..6. A144051

Primes p such that the polynomial x² + x + p generates only primes for x = 1..5. A187058

Hypotenuse C of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q²-p², c=q²+p², b=2·p*q, s=a+b+c, s-+1 are primes. A155175

Primes of the form p = prime(k) = (prime(k+3)+prime(k-1))/2. A126238

Prime numbers p of the form 10k+1 for which the quintic polynomial x⁵-x-1 modulus p is factorizable into five binomials. A135842