Properties of the Number 71405

Seventy-One Thousand Four Hundred Five

Basics

Value: 71404 → 71405 → 71406

Parity: odd

Prime: No

Previous Prime: 71399

Next Prime: 71411

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 14281

Divisors: 1, 5, 14281, 71405

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011011101101

Octal: 213355

Duodecimal: 353A5

Hexadecimal: 116ed

Square: 5098674025

Square Root: 267.21714016881475

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) = ∑_{i=1..floor((n+1)/4)} a(2·i-1) * a(n-2·i+1), with a(1)=a(2)=1 and a(3)=5. A24729

(1/2)*((∑_k=0..p C(p,k)*C(p+k,k)) - 2^p - 1)/p² where p runs through the primes. A71405