Properties of the Number 49281

Forty-Nine Thousand Two Hundred Eighty-One

Basics

Value: 49280 → 49281 → 49282

Parity: odd

Prime: No

Previous Prime: 49279

Next Prime: 49297

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 16427

Divisors: 1, 3, 16427, 49281

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100000010000001

Octal: 140201

Duodecimal: 24629

Hexadecimal: c081

Square: 2428616961

Square Root: 221.99324314041633

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(1)=4, a(2)=3, a(n) = 4·a(n-1) + 3·a(n-2). A189742

Semiprimes in A007504 (the sum of first n primes). A189072

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 233", based on the 5-celled von Neumann neighborhood. A286968

Smallest squarefree integer k such that Q(sqrt(k)) has class number n. A81363

Smallest d such that real quadratic field with discriminant d has class number n. A81364

Least positive squarefree integer k such that Q(sqrt(k)) has a class number greater than that of any previous integer. A279908

Numerators of coefficients in power series for -log(1+x)*log(1-x). A49281

Petersen graph (8,2) coloring a rectangular array: number of 5Xn 0..15 arrays where 0..15 label nodes of a graph with edges 0,1 0,8 8,14 8,10 1,2 1,9 9,15 9,11 2,3 2,10 10,12 3,4 3,11 11,13 4,5 4,12 12,14 5,6 5,13 13,15 6,7 6,14 7,0 7,15 and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an edge of this graph. A223603