Properties of the Number 2071

Two Thousand Seventy-One

Basics

Value: 2070 → 2071 → 2072

Parity: odd

Prime: No

Previous Prime: 2069

Next Prime: 2081

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 19 × 109

Divisors: 1, 19, 109, 2071

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000010111

Octal: 4027

Duodecimal: 1247

Hexadecimal: 817

Square: 4289041

Square Root: 45.50824101193101

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

Central polygonal numbers: a(n) = n² - n + 1. A2061

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

a(n) = 4·n² - 10·n + 7. A54554

Generalized 14-gonal numbers: m*(6·m-5), m = 0,+1,-1,+2,-2,+3,-3,... A195818

14-gonal (or tetradecagonal) numbers: a(n) = n*(6·n-5). A51866

a(n) = A005449(n) - 1, where A005449 = second pentagonal numbers. A95794

Numbers k such that the fractional part of (3/2)^k decreases monotonically to zero. A81464

Number of sensed planar maps with n edges. A6384

Number of (2,0)-separable partitions of n; see Comments. A239482

Stirling transform of A001563: a(0) = 1 and a(n) = ∑_k=1..n Stirling2(n,k)*k·k! for n >= 1. A69321