Properties of the Number 4681

Four Thousand Six Hundred Eighty-One

Basics

Value: 4680 → 4681 → 4682

Parity: odd

Prime: No

Previous Prime: 4679

Next Prime: 4691

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 31 × 151

Divisors: 1, 31, 151, 4681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001001001001

Octal: 11111

Duodecimal: 2861

Hexadecimal: 1249

Square: 21911761

Square Root: 68.4178339323893

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

Fermat pseudoprimes to base 2, also called Sarrus numbers or Poulet numbers. A1567

Hex (or centered hexagonal) numbers: 3·n*(n+1)+1 (crystal ball sequence for hexagonal lattice). A3215

sigma₃(n): sum of cubes of divisors of n. A1158

a(n) = (8ⁿ - 1)/7. A23001

Strong pseudoprimes to base 2. A1262

12-gonal (or dodecagonal) numbers: a(n) = n*(5·n-4). A51624

Euler pseudoprimes: composite numbers n such that 2^(n-1/2) == +-1 (mod n). A6970

a(n) = n⁴ + n³ + n² + n + 1. A53699

Number of compositions (ordered partitions) of n into distinct odd parts. A32021

Euler-Jacobi pseudoprimes: 2^(n-1/2) == (2 / n) mod n, where (2 / n) is a Jacobi symbol. A47713