Properties of the Number 12988

Twelve Thousand Nine Hundred Eighty-Eight

Basics

Value: 12987 → 12988 → 12989

Parity: even

Prime: No

Previous Prime: 12983

Next Prime: 13001

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 17 × 191

Divisors: 1, 2, 4, 17, 34, 68, 191, 382, 764, 3247

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11001010111100

Octal: 31274

Duodecimal: 7624

Hexadecimal: 32bc

Square: 168688144

Square Root: 113.964906879267

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 4^k - 2^k - 1 is prime. A98845

a(n) = (9·n² - 5·n + 2)/2. A140064

Numbers k such that 255·2^k-1 is prime. A50886

Least number k >= 0 such that (n!-k)/n is prime. A245696

Coefficient of·in minimal polynomial of the continued fraction [1ⁿ,1/2,1,1,1,...], where 1ⁿ means n ones. A266700

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A120971. A381602

Sum of first n 7-almost primes. A86059

Integers whose binary digits "1" define, if sorted into a quadrant shape whose right angle lies in a Go board corner, same colored Go stones that surely live all, but not if any stone is omitted. A166537

a(n) is the lowest number in the sequence of the first occurrence of exactly n consecutive numbers with at least one repeated digit, or -1 if no such number exists. A337707

Coefficient of xⁿ in the expansion of 1 / ( (1-x) * (1-x-x³)² )ⁿ. A372459