Properties of the Number -128220

One Hundred Twenty-Eight Thousand Two Hundred Twenty

Basics

Value: -128221 → -128220 → -128219

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 2137

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111010011011100

Octal: -372334

Duodecimal: -62250

Hexadecimal: -1f4dc

Square: 16440368400

Square Root: 358.0782037488459

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

Values of n such that N=(an+1)(bn+1)(cn+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,33. A64253

Sequence uniquely defined by: (n-1)*a(n) = n*[xⁿ] B(x) for n>1 with a(0)=a(1)=1, or, equivalently, 1+x - A(x) + x·A'(x) = x·B'(x), where B(x) = x/series_reversion(x·A(x)). A120958

Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..1 nX4 array. A218080