Properties of the Number 42655

Forty-Two Thousand Six Hundred Fifty-Five

Basics

Value: 42654 → 42655 → 42656

Parity: odd

Prime: No

Previous Prime: 42649

Next Prime: 42667

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 19 × 449

Divisors: 1, 5, 19, 95, 449, 2245, 8531, 42655

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010011010011111

Octal: 123237

Duodecimal: 20827

Hexadecimal: a69f

Square: 1819449025

Square Root: 206.53086936339565

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

Number of ways 1/n can be expressed as the sum of four distinct unit fractions: 1/n = 1/w + 1/x + 1/y + 1/z satisfying 0 < w < x < y < z. A241883

Sum of Fibonacci and tribonacci numbers: a(n) = A000073(n) + A000045(n). A338192

Array T(n, k) = ∑_j=2..n+2 (-1)^n-j*Stirling2(n+1, j-1)*j!*j^k/2, for n and k >= 0, read by antidiagonals. A347940

Denominators of continued fraction convergents to sqrt(857). A42655

Number of nX4 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero. A231059