Properties of the Number 12019

Twelve Thousand Nineteen

Basics

Value: 12018 → 12019 → 12020

Parity: odd

Prime: No

Previous Prime: 12011

Next Prime: 12037

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 17 × 101

Divisors: 1, 7, 17, 101, 119, 707, 1717, 12019

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111011110011

Octal: 27363

Duodecimal: 6B57

Hexadecimal: 2ef3

Square: 144456361

Square Root: 109.63119993870357

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 read by rows: cube of the lower triangular mean matrix. A27447

T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 2,2,1,1,1 for x=0,1,2,3,4. A197545

Numerator of ∑_k=1..n H(k)/k, where H(k) is k-th harmonic number. A27459

Triangle of numerators of the cube of a certain lower triangular matrix. A119935

7 times pentagonal numbers: a(n) = 7·n*(3·n-1)/2. A152744

Sums of prime points found in four grids in each corner of a square. A161190

G.f. satisfies A(x) = 1/∏_n>=1 (1 - xⁿ*A(xⁿ)²). A196192

Expansion of x / ((1-12x)(1-15x)(1-20x)(1-30x)(1-60x)). A103878

Number of unlabeled loopless multigraphs with n edges covering four vertices. A328652

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 15 ones. A31783