Properties of the Number 71320

Seventy-One Thousand Three Hundred Twenty

Basics

Value: 71319 → 71320 → 71321

Parity: even

Prime: No

Previous Prime: 71317

Next Prime: 71327

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 5 × 1783

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 1783, 3566

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001011010011000

Octal: 213230

Duodecimal: 35334

Hexadecimal: 11698

Square: 5086542400

Square Root: 267.05804612480784

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

Generalized Stirling2 array (5,2). A91534

Triangle read by rows: T(n,k) is the number of weakly connected oriented graphs on n unlabeled nodes with k arcs, n >= 1, k = 0..n*(n-1)/2. A350734

Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes with k arcs, n >= 0, k = 0..n*(n-1)/2. A350733

Pisot sequence E(14,23), a(n) = floor( a(n-1)²/a(n-2)+1/2 ). A10902

Third column (k=4) sequence of array A091534 ((5,2)-Stirling2). A91740

G.f. A(x) satisfies A(x) = 1/(1 - x/(1 - x·A(x))³). A161797

Least of four consecutive numbers which are cubefree and not squarefree, i.e., numbers k such that {k, k+1, k+2, k+3} are in A067259. A71320

G.f.: A(x) = x + x·ITERATE²(x + x·ITERATE⁴(x + x·ITERATE⁸(x + x·ITERATE¹⁶(x + ...)))), where ITERATEⁿ(F(x)) denotes the n-th iteration of F(x), and the nesting of iterations continue indefinitely. A212491