Properties of the Number 42813

Forty-Two Thousand Eight Hundred Thirteen

Basics

Value: 42812 → 42813 → 42814

Parity: odd

Prime: No

Previous Prime: 42797

Next Prime: 42821

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 67 × 71

Divisors: 1, 3, 9, 67, 71, 201, 213, 603, 639, 4757

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011100111101

Octal: 123475

Duodecimal: 20939

Hexadecimal: a73d

Square: 1832952969

Square Root: 206.91302520624455

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 n such that 2·reversal(n)=σ(n). A105324

Divide natural numbers in groups with prime(n) elements and add together. A34957

Odd numbers k that can be factored to such a pair of coprime factors·and y that A347381(k) < min(A347381(x), A347381(y)). A347390

Numbers k such that sopfr(k) = τ(k)². A305026

Strong pseudoprimes to base 91. A20317

Row sums of the triangle A105160. A105157

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, -1, 1), (1, 0, -1), (1, 0, 1), (1, 1, -1)}. A149362

Denominators of continued fraction convergents to sqrt(937). A42813