Properties of the Number 71868

Seventy-One Thousand Eight Hundred Sixty-Eight

Basics

Value: 71867 → 71868 → 71869

Parity: even

Prime: No

Previous Prime: 71867

Next Prime: 71879

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 53 × 113

Divisors: 1, 2, 3, 4, 6, 12, 53, 106, 113, 159

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100010111100

Octal: 214274

Duodecimal: 35710

Hexadecimal: 118bc

Square: 5165009424

Square Root: 268.08207698389685

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

Triangle T(n,k), n>=1, 0<=k<=n-1, read by rows: T(n,k)/(n-1)! is the coefficient of x^k in polynomial p_n for the n-th row sequence of A145153. A145142

a(n) = 2 + (89040 + (71868 + (29932 + (8449 + (1960 + (322 + (28 + n)*n)*n)*n)*n)*n)*n)*n/40320. A145130

Number of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)>2. A212899

2nd column of A145142. A145144

Volume of torus (rounded down) with major radius = n and minor radius = n/3. A228641

Number of integers k (1 <= k <= n) such that k²+1 is prime. A71868