Properties of the Number -128750

One Hundred Twenty-Eight Thousand Seven Hundred Fifty

Basics

Value: -128751 → -128750 → -128749

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 ⁴ × 103

Divisors: 1, 2, 5, 10, 25, 50, 103, 125, 206, 250

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111011011101110

Octal: -373356

Duodecimal: -62612

Hexadecimal: -1f6ee

Square: 16576562500

Square Root: 358.8175023601831

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

G.f.: (1-2·x*c(x))/(1-3·x*c(x)) where c(x) = (1 - sqrt(1-4·x))/(2·x) is the g.f. for Catalan numbers A000108. A49027

Square array read by antidiagonals: T(n,k)=(T(n,k-1)*n²-Catalan(k-1))/(n-1) with a(n,1)=1 and a(1,k)=Catalan(k) where Catalan(k)=C(2k,k)/(k+1)=A000108(k). A67345

Riordan array (1/(1-3x·c(x)),xc(x)), c(x) the g.f. of A000108. A117375

Expansion of ∏_n>=1 (1 - x^5·n)/(1 - xⁿ)³ in powers of x. A278668

Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + ∑_j=0..k A(n-1,j)*A(k-j,0) with A(0,k) = 1. A392095