Properties of the Number 71085

Seventy-One Thousand Eighty-Five

Basics

Value: 71084 → 71085 → 71086

Parity: odd

Prime: No

Previous Prime: 71081

Next Prime: 71089

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 677

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 677, 2031

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001010110101101

Octal: 212655

Duodecimal: 35179

Hexadecimal: 115ad

Square: 5053077225

Square Root: 266.61770383828605

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) = n*(n+1)*(7·n² - n - 4)/4. A172077

a(0) = 0, a(n) = smallest composite k such that φ(k + 2ⁿ) = φ(k) + 2ⁿ; also cototient(k + 2ⁿ) = cototient(k). A63104

Determinant of the n X n matrix whose element (i,j) equals μ(|i-j|) where μ(k) is the moebius function for k > 0 and μ(0) = 0. A71085