Properties of the Number 42006

Forty-Two Thousand Six

Basics

Value: 42005 → 42006 → 42007

Parity: even

Prime: No

Previous Prime: 41999

Next Prime: 42013

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7001

Divisors: 1, 2, 3, 6, 7001, 14002, 21003, 42006

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010000010110

Octal: 122026

Duodecimal: 20386

Hexadecimal: a416

Square: 1764504036

Square Root: 204.95365329751993

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

Numbers k > 1 such that, in base 5, k and k² contain the same digits in the same proportion. A61659

Number of (n+2) X 4 binary arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock. A190026

Start with a Koch snowflake tile, and repeatedly append along the tiles of the previous step tiles scaled by a factor of sqrt(1/3) and rotated by 90 degrees that do not overlap with any prior tile and of which one third of the perimeter matches one sixth of the perimeter of adjacent prior tiles; a(n) gives the number of tiles appended at n-th step. A330844

Generalized octagonal numbers: k*(3·k-2), k=0, +- 1, +- 2, +-3, ... A1082

Numerators of continued fraction convergents to sqrt(526). A42006