Properties of the Number 42519

Forty-Two Thousand Five Hundred Nineteen

Basics

Value: 42518 → 42519 → 42520

Parity: odd

Prime: No

Previous Prime: 42509

Next Prime: 42533

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 14173

Divisors: 1, 3, 14173, 42519

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010011000010111

Octal: 123027

Duodecimal: 20733

Hexadecimal: a617

Square: 1807865361

Square Root: 206.20135790047553

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

The number of regions formed inside an isosceles triangle by straight line segments mutually connecting all vertices and all points that divide the two equal length sides into n equal parts; the base of the triangle contains no points other than its vertices. A332953

Add 1, multiply by 1, add 2, multiply by 2, etc., start with 3. A19462

G.f. satisfies: A(x) = ∑_n>=0 (1 - (1 - x·A(x))ⁿ)ⁿ. A187827

Number of 0..2 arrays x(0..n-1) of n elements with zero n-1st difference. A200148

Denominators of continued fraction convergents to sqrt(788). A42519