Properties of the Number -4181

One Hundred Eighty-One

Basics

Value: -4182 → -4181 → -4180

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 37 × 113

Divisors: 1, 37, 113, 4181

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1000001010101

Octal: -10125

Duodecimal: -2505

Hexadecimal: -1055

Square: 17480761

Square Root: 64.66065264130884

Classification

Fibonacci: Yes

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

a(n) = a(n-1)+a(n-2), n>1 ; a(0)=1, a(1)=-1. A152163

a(n) = (-1)ⁿ * Fibonacci(2·n+1). A99496

a(n)=3a(n-1)-4a(n-2)+2a(n-3)-a(n-4), a(0)=a(1)=a(2)=0, a(3)=1, a(4)=3. A138112

Dirichlet inverse of Fibonacci numbers, when started from A000045(1): 1, 1, 2, 3, 5, 8, 13, 21, ... A349451

Binomial transform of 1, 1, 0, -1, -1 (periodically continued). A138003

a(n)=(-1)^C(n+1,2)*(F(n+1)*(1+(-1)ⁿ)/2+F(n+2)*(1-(-1)ⁿ)/2). A178115

a(n) = F(n) * (-1)^n*(n-1/2) where F(n) = A000045(n) Fibonacci numbers. A333378

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 363", based on the 5-celled von Neumann neighborhood. A268194

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 107", based on the 5-celled von Neumann neighborhood. A270167

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 211", based on the 5-celled von Neumann neighborhood. A270900