Properties of the Number -129645

One Hundred Twenty-Nine Thousand Six Hundred Forty-Five

Basics

Value: -129646 → -129645 → -129644

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 43 × 67

Divisors: 1, 3, 5, 9, 15, 43, 45, 67, 129, 201

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11111101001101101

Octal: -375155

Duodecimal: -63039

Hexadecimal: -1fa6d

Square: 16807826025

Square Root: 360.0624945755945

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

a(n) is the number of 5 element sets of distinct integer-sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units with a trapezoid filled by 3 trapezoids. A391204

a(n) = (8·n³ + 12·n² + 4·n - 9)/3. A358035