Properties of the Number -170820

One Hundred Seventy Thousand Eight Hundred Twenty

Basics

Value: -170821 → -170820 → -170819

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 5 × 13 × 73

Divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 13

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001101101000100

Octal: -515504

Duodecimal: -82A30

Hexadecimal: -29b44

Square: 29179472400

Square Root: 413.30376238306854

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 primitive (aperiodic, or Lyndon) asymmetric rhythm cycles: ones having no nontrivial shift automorphism. A6575

Number of (w,x,y,z) with all terms in {1,...,n} and 3w>=x+y+z+n. A212250

a(n) = 3·a(n-1) - a(n-3) + 3·a(n-4), with initial values 0,0,0,1. A133405

Number of unordered pairs of distinct strict integer partitions of n. A366132

Numbers k such that the sum of unitary divisors of k² is a square. A64498

Triangular numbers for which the sum of the digits equals the sum of the digits of the next triangular number. A117511

Number of strong dichotomy patterns in Z/2nZ, i.e., bicolor patterns of Z/2nZ with respect to the action of Aff(Z/2nZ) with trivial isotropy group. A360624

Triangular numbers such that the three numbers before it and the three numbers after it are squarefree. A374393