Properties of the Number 42605

Forty-Two Thousand Six Hundred Five

Basics

Value: 42604 → 42605 → 42606

Parity: odd

Prime: No

Previous Prime: 42589

Next Prime: 42611

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 8521

Divisors: 1, 5, 8521, 42605

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010011001101101

Octal: 123155

Duodecimal: 207A5

Hexadecimal: a66d

Square: 1815186025

Square Root: 206.4097865896867

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 subsets of {1..n} with all distinct lengths of maximal runs (increasing by 1). A384175

Semiprimes whose reversal + 1 is a square. A245362

Numbers that are the sum of 8 positive 5th powers. A3353

Denominators of continued fraction convergents to sqrt(831). A42605

Number of (4+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A254263

Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally and vertically. A254302