Properties of the Number 71211

Seventy-One Thousand Two Hundred Eleven

Basics

Value: 71210 → 71211 → 71212

Parity: odd

Prime: No

Previous Prime: 71209

Next Prime: 71233

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 3391

Divisors: 1, 3, 7, 21, 3391, 10173, 23737, 71211

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011000101011

Octal: 213053

Duodecimal: 35263

Hexadecimal: 1162b

Square: 5071006521

Square Root: 266.8538926079213

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

Triangle T(n, k) = Numbers of ways to place k points on a triangular grid of side n so that no two of them are adjacent. Triangle read by rows. A239567

The number of irreducible balanced subsets of [n]. A389802

Number of ways to place 4 points on a triangular grid of side n so that no two of them are adjacent. A239570

a(n) = A389802(2n+1). A389803

Triangular array T(n,k) read by rows, giving number of labeled free trees such that the root is smaller than all its children, with respect to the number n of vertices and to the label k of the root. A71211