Properties of the Number -18105

Eighteen Thousand One Hundred Five

Basics

Value: -18106 → -18105 → -18104

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 17 × 71

Divisors: 1, 3, 5, 15, 17, 51, 71, 85, 213, 255

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -100011010111001

Octal: -43271

Duodecimal: -A589

Hexadecimal: -46b9

Square: 327791025

Square Root: 134.55482154125878

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 partitions of n if there are two kinds of 1's and two kinds of 2's. A97

Numbers k such that 6·k+1, 6·k+7, 6·k+13, 6·k+19 are consecutive primes. A90839

Number of bipartite partitions of n white objects and 3 black ones. A412

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+967)² = y². A130017

Row sums of the triangle described in A082200. A82203

a(n) = n*(n+1)*(22·n-19)/6. A256716

Products of three distinct tribonacci numbers > 1. A274434

Assume the conjectured terms of A105594 are the correct beginnings of the trajectories described in A003508. a(n) is a record length of b(n) iterations to arrive at the collected trajectories. This sequence cites the a(n)'s. A105600

a(1) = 1, and for each k >=2, a(k) is the smallest number n such that n/sin(n) > a(k)/sin(a(k)), so that a(1)/sin(a(1)) > a(2)/sin(a(2)) > ... > a(k)/sin(a(k)) > ... A172445

Row sums of triangle A118032, where the matrix square of A118032 forms a diagonal bisection of A118032. A118036