Properties of the Number 51242

Fifty-One Thousand Two Hundred Forty-Two

Basics

Value: 51241 → 51242 → 51243

Parity: even

Prime: No

Previous Prime: 51241

Next Prime: 51257

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 25621

Divisors: 1, 2, 25621, 51242

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100100000101010

Octal: 144052

Duodecimal: 257A2

Hexadecimal: c82a

Square: 2625742564

Square Root: 226.36695871968595

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

a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 245) or the same sequence for the mesh pattern (12, 350). A289599

Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. A299224

Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally. A232455

Array T by antidiagonals; T(n,k)=k-th binary number d(1),...,d(j) for which exactly n digits d(i) satisfy d(i)=d(j+1-i) (n=0,1,2,...; k=1,2,3,..). A51242