Properties of the Number -1306809

Three Hundred Six Thousand Eight Hundred Nine

Basics

Value: -1306810 → -1306809 → -1306808

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 20743

Divisors: 1, 3, 7, 9, 21, 63, 20743, 62229, 145201, 186687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111111000010111001

Octal: -4770271

Duodecimal: -530309

Hexadecimal: -13f0b9

Square: 1707749762481

Square Root: 1143.1574694677895

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

Number of 5-level labeled linear rooted trees with n leaves. A50353

Generalized Fubini numbers. Square array read by ascending antidiagonals, A(n,k) = 1 + k*(∑_j=1..n-1 C(n,j)*A(j,k)); n>=0 and k>=0. A257565

E.g.f.: (32 - 31·cosh(x)) / (41 - 40·cosh(x)). A250915