Properties of the Number 42856

Forty-Two Thousand Eight Hundred Fifty-Six

Basics

Value: 42855 → 42856 → 42857

Parity: even

Prime: No

Previous Prime: 42853

Next Prime: 42859

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 11 × 487

Divisors: 1, 2, 4, 8, 11, 22, 44, 88, 487, 974

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011101101000

Octal: 123550

Duodecimal: 20974

Hexadecimal: a768

Square: 1836636736

Square Root: 207.0169075220669

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

Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation. A61777

The number of lit cells in weakly increasing partitions of n when light shines from the northwest. Here partitions are represented from left to right by columns of cells. A366069

G.f. satisfies: A(x) = 1 + x·A(x) * A(x·A(x)) + x²*A(x)² * A'(x·A(x)). A132070

Numerators of continued fraction convergents to sqrt(959). A42856