Properties of the Number 12887

Twelve Thousand Eight Hundred Eighty-Seven

Basics

Value: 12886 → 12887 → 12888

Parity: odd

Prime: No

Previous Prime: 12853

Next Prime: 12889

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 7 ² × 263

Divisors: 1, 7, 49, 263, 1841, 12887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001001010111

Octal: 31127

Duodecimal: 755B

Hexadecimal: 3257

Square: 166074769

Square Root: 113.52092318158799

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

Numbers k such that k!!-4 is prime. A123910

Number of Golomb rulers of length n. A169942

Smallest number that requires n iterations of the bi-unitary totient function (A116550) to reach 1. A5424

The sums of pairs of adjacent terms are the odd palindromic primes in ascending order. A181881

Number of length-n restricted growth strings (RGS) with growth <= six and fixed first element. A305966

Number of (w,x,y) with all terms in {0,...,n} and w < R < 2·w, where R = range{w,x,y} = max(w,x,y)-min(w,x,y). A213400

Number of 1X4 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2·n² (number of collections of 1 zero-sum 4-vectors with total modulus squared not more than 2·n², ignoring vector and component permutations). A192691

a(n) = least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 3rd elementary symmetric function. A27917

n-th single or isolated number·n-th non-single or nonisolated number. A167885

a(n) is the total number of all winning moves for all partitions of n which represent Chomp positions. A284686