Properties of the Number 42661

Forty-Two Thousand Six Hundred Sixty-One

Basics

Value: 42660 → 42661 → 42662

Parity: odd

Prime: No

Previous Prime: 42649

Next Prime: 42667

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 37 × 1153

Divisors: 1, 37, 1153, 42661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010011010100101

Octal: 123245

Duodecimal: 20831

Hexadecimal: a6a5

Square: 1819960921

Square Root: 206.54539452623968

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row and column divisible by 7, read as a binary number with top and left being the most significant bits. A262319

Number of partitions p of n such that median(p) < multiplicity(min(p)). A240212

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1)*b(n), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A296273

Strong pseudoprimes to base 87. A20313

Number of (n+2)X(4+2) 0..1 arrays with each row and column divisible by 7, read as a binary number with top and left being the most significant bits. A262316

Number of (n+2)X(6+2) 0..1 arrays with each row and column divisible by 7, read as a binary number with top and left being the most significant bits. A262318

Denominators of continued fraction convergents to sqrt(860). A42661