Properties of the Number 6541

Six Thousand Five Hundred Forty-One

Basics

Value: 6540 → 6541 → 6542

Parity: odd

Prime: No

Previous Prime: 6529

Next Prime: 6547

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 31 × 211

Divisors: 1, 31, 211, 6541

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100110001101

Octal: 14615

Duodecimal: 3951

Hexadecimal: 198d

Square: 42784681

Square Root: 80.876448982383

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

a(n) = least k such that the remainder when 16^k is divided by k is n. A128156

Pseudoprimes to base 10. A5939

16-gonal (or hexadecagonal) numbers: a(n) = n*(7·n-6). A51868

a(n+1) = a(n)+floor(a(n)/3), a(1) = 3. A100585

T(n,k)=Number of nXk 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards. A201700

a(n) = PrimePi(n³) - PrimePi(n)³, where PrimePi = A000720. A291538

a(n) = Card{ (x,y,z,u,v) | lcm(x,y,z,u,v)=n }. A70921

Nonprimes k such that k divides 3^k-1 - 2^k-1. A73631

Nonprime terms in A121912. A121014

Indices of hexagonal numbers (A000384) which are also centered hexagonal numbers (A003215). A253175