Properties of the Number 871

Eight Hundred Seventy-One

Basics

Value: 870 → 871 → 872

Parity: odd

Prime: No

Previous Prime: 863

Next Prime: 877

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 × 67

Divisors: 1, 13, 67, 871

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1101100111

Octal: 1547

Duodecimal: 607

Hexadecimal: 367

Square: 758641

Square Root: 29.512709126747414

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

Central polygonal numbers: a(n) = n² - n + 1. A2061

Number of partitions of n into parts 5k+1 or 5k+4. A3114

Sum of divisors of square numbers. A65764

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

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

a(n) = 4·n² - 10·n + 7. A54554

The n-th n-gonal number: a(n) = n*(n² - 3·n + 4)/2. A60354

a(n) = least m such that if a/b < c/d where a,b,c,d are integers in [0,n], then a/b < k/m < c/d for some integer k. A1000

Numbers whose sum of even digits and sum of odd digits are equal. A36301

V-toothpick (or honeycomb) sequence (see Comments lines for definition). A161206