Properties of the Number 42118

Forty-Two Thousand One Hundred Eighteen

Basics

Value: 42117 → 42118 → 42119

Parity: even

Prime: No

Previous Prime: 42101

Next Prime: 42131

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 21059

Divisors: 1, 2, 21059, 42118

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010010000110

Octal: 122206

Duodecimal: 2045A

Hexadecimal: a486

Square: 1773925924

Square Root: 205.22670391545054

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) = floor(b(n)), where b(1) = 1 and b(n) = b(n-1) + ∑_k=1..n-1 b(k)/(n-1). A376995

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 603", based on the 5-celled von Neumann neighborhood. A273173

Consider constructing binary words that begin with 0 such that the subword 00, whenever it appears, is followed by 111. Then a(n) counts such words at length n (including those where the string 111 is yet being completed - see Example). A340215

Numerators of continued fraction convergents to sqrt(584). A42118

Number of nX4 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 4,3,1,1,1 for x=0,1,2,3,4. A197360