Properties of the Number 18071

Eighteen Thousand Seventy-One

Basics

Value: 18070 → 18071 → 18072

Parity: odd

Prime: No

Previous Prime: 18061

Next Prime: 18077

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 17 × 1063

Divisors: 1, 17, 1063, 18071

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011010010111

Octal: 43227

Duodecimal: A55B

Hexadecimal: 4697

Square: 326561041

Square Root: 134.42841961430625

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) = a(n-1) + a(m) for n >= 4, where m = 2·n - 2 - 2^p+1 and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = a(2) = 1 and a(2) = 4. A50039

Positions where A109890(n) = ∑_{i = 1..n-1} A109890(i). A111315

a(n) = 49·n² - 78·n + 31. A157368

Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w²>=x²+y². A211803

Numbers n for which there are exactly eight k such that n = k + reverse(k). A72432

Numerator of 1 + 1/2 + 2/3 + 3/4 + ... + (n-1)/n. A61483

a(1) = 1; a(n) is the smallest number not yet used that is not relatively prime to n nor relatively prime to a(n-1). A119018

Decimal expansion of Sum{k=1..infinity}{1/k^σ(k)}. A192265

Expansion of 1/((1-3x)(1-8x)(1-12x)). A18071