Properties of the Number -205128

Two Hundred Five Thousand One Hundred Twenty-Eight

Basics

Value: -205129 → -205128 → -205127

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 7 × 11 × 37

Divisors: 1, 2, 3, 4, 6, 7, 8, 9, 11, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110010000101001000

Octal: -620510

Duodecimal: -9A860

Hexadecimal: -32148

Square: 42077496384

Square Root: 452.91058720237487

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 palindromic divisors of a(n) sets a new record. A93036

Numbers that are proper divisors of the number you get by rotating digits right once. A34089

a(n) is the least number with n palindromic divisors. A87997

Numbers m with the property that shifting the rightmost digit of m to the left end multiplies the number by 4. A146569

Coefficients in expansion of 1/E₁₀. A285836

Expansion of θ series of E₇ lattice in powers of q². A4008

Number of intersections of diagonals in the exterior of a regular n-gon. A211382

Nonzero coefficients in θ series of {E₇}* lattice. A30443

Number of 8-step left-handed knight's tours (moves only out two, left one) on an n X n board summed over all starting positions. A187178

a(n) is the smallest number whose divisors include exactly n that can be written in the form m + reverse(m), for some m (A067030). A358513