Properties of the Number 6845

Six Thousand Eight Hundred Forty-Five

Basics

Value: 6844 → 6845 → 6846

Parity: odd

Prime: No

Previous Prime: 6841

Next Prime: 6857

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 37 ²

Divisors: 1, 5, 37, 185, 1369, 6845

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101010111101

Octal: 15275

Duodecimal: 3B65

Hexadecimal: 1abd

Square: 46854025

Square Root: 82.73451516749222

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 subsets {x(1),x(2),...,x(k)} of {1,2,...,n} such that all differences |x(i)-x(j)| are distinct. A143823

a(n) = 5·n². A33429

Triangle read by rows: T(n,k) is the number of k-block partitions of an n-set up to rotations and reflections. A152176

a(n) = 8·n² + 4·n + 1. A102083

Triangle read by rows: T(n,k) = number of primitive (period n) n-bead bracelet structures using exactly k different colored beads. A276543

Hafnian of a +/-1 array. A202038

Denominator of (1+σ(s)) / ((s+1)/2), where s is the square of n prime-shifted once (s = A003961(n)² = A003961(n²)). A337339

Numbers k such that σ(k) = ψ(k) + τ(k). A387953

Smith numbers of order 2. A174460

Positive integers·such that x³ = y⁴ + z² for some positive integers y and z. A266212