Properties of the Number 27581

Twenty-Seven Thousand Five Hundred Eighty-One

Basics

Value: 27580 → 27581 → 27582

Parity: odd

Prime: Yes

Previous Prime: 27551

Next Prime: 27583

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 27581

Divisors: 1, 27581

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110101110111101

Octal: 65675

Duodecimal: 13B65

Hexadecimal: 6bbd

Square: 760711561

Square Root: 166.0752841334315

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

Smallest prime p having n different cycles in decimal expansions of k/p, k=1..p-1. A54471

One half of second column of Lucas bisection triangle (odd part). A61171

Lesser of twin primes p1 such that p1+(p2²-p1²) and p2+(p2²-p1²) are prime numbers. A174922

Primes p such that p³ - 12 and p³ + 12 are also primes. A153322

Positions of records in A205561. A378189

a(n) = p is the smallest prime such that p = n + h(n)² and p is the first prime following h(n)². The smallest immediate post-square primes with distance n = p - h(n)². A58056

Records in A079387. A79388

Primes p such that p+1 is a triprime and 2·p+1 is prime. A386295

a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers). A24469

a(n) = s(1)*s(n) + s(2)*s(n-1) + ... + s(k)*s(n-k+1), where k = [n/2], s = (Lucas numbers). A25089