Properties of the Number -1926

Nine Hundred Twenty-Six

Basics

Value: -1927 → -1926 → -1925

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 107

Divisors: 1, 2, 3, 6, 9, 18, 107, 214, 321, 642

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11110000110

Octal: -3606

Duodecimal: -1146

Hexadecimal: -786

Square: 3709476

Square Root: 43.88621651498338

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

The q expansion of λ⁵, a Hauptmodul for Gamma₁(5). A78905

Expansion of 1/(1 - 9·x*(1-x)³)^1/3. A361845

Coefficient of y⁰ in G(x,y)³ where G(x,y) = ∑_n=-oo..+oo (1-xⁿ)ⁿ * xⁿ * yⁿ. A263188

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A385015. A385019

Pentagonal numbers: a(n) = n*(3·n-1)/2. A326

Fifth spoke of a hexagonal spiral. A56109

a(n) = L(4·n+2)/3, where L=A000032 (the Lucas sequence). A49685

Pentagonal numbers with even index. A49452

Array T(k,n) read by antidiagonals. G.f.: x(1-x)/(1-kx+x²), k>1. A94954

|First digit - second digit + third digit - fourth digit ...| = 12. A60980