Properties of the Number 3871

Three Thousand Eight Hundred Seventy-One

Basics

Value: 3870 → 3871 → 3872

Parity: odd

Prime: No

Previous Prime: 3863

Next Prime: 3877

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 ² × 79

Divisors: 1, 7, 49, 79, 553, 3871

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100011111

Octal: 7437

Duodecimal: 22A7

Hexadecimal: f1f

Square: 14984641

Square Root: 62.21736092120912

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) = 2·n² - 1. A56220

Centered icosahedral (or cuboctahedral) numbers, also crystal ball sequence for f.c.c. lattice. A5902

Sum of divisors of square numbers. A65764

Number of sublattices of index n in generic 3-dimensional lattice. A1001

Number of disconnected 2-regular graphs on n vertices. A165652

a(n) = 7·a(n-1) - 14·a(n-2) + 7·a(n-3), a(0)=1, a(1)=3, a(2)=9. A215007

Number of polygons formed when every pair of vertices of a regular n-gon are joined by an infinite line. A344857

Number of (1,2,3)-matching compositions of n. A335514

Sum of third powers of three consecutive primes. A133530

Trajectory of n under the Reverse and Add! operation carried out in base 2 does not reach a palindrome and (presumably) does not join the trajectory of any term m < n. A75252