Properties of the Number 42148

Forty-Two Thousand One Hundred Forty-Eight

Basics

Value: 42147 → 42148 → 42149

Parity: even

Prime: No

Previous Prime: 42139

Next Prime: 42157

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 41 × 257

Divisors: 1, 2, 4, 41, 82, 164, 257, 514, 1028, 10537

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010010100100

Octal: 122244

Duodecimal: 20484

Hexadecimal: a4a4

Square: 1776453904

Square Root: 205.2997808084558

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 of number of (weakly) connected unlabeled digraphs with n nodes and k arcs (n >=2, k >= 1). A54733

Irregular triangular array read by rows: T(n,k) is the number of non-isomorphic unlabeled weakly connected digraphs on n nodes and with k arcs. A283753

Numbers n such that prime(n) + reversal(prime(n)) is a square. A227371

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}. A148227

Numerators of continued fraction convergents to sqrt(599). A42148

G.f. satisfies: A(x) = ∑_n>=0 q^n*(n+1/2) where q = x·A(x)⁸. A194043

Number of nX3 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal. A207545