Properties of the Number 40641

Forty Thousand Six Hundred Forty-One

Basics

Value: 40640 → 40641 → 40642

Parity: odd

Prime: No

Previous Prime: 40639

Next Prime: 40693

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 19 × 23 × 31

Divisors: 1, 3, 19, 23, 31, 57, 69, 93, 437, 589

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111011000001

Octal: 117301

Duodecimal: 1B629

Hexadecimal: 9ec1

Square: 1651690881

Square Root: 201.59613091525344

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

Odd composite integers m such that U(m)² == 1 (mod m) and V(m) == 7 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=7 and b=-1, respectively. A337630

Triangular polyominoes (or polyiamonds) with n cells at most (turning over is allowed, holes are allowed, must be connected along edges). A130867

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x+84847)² = y². A201917

Character of extremal vertex operator algebra of rank 9. A28527

Numbers having four 6's in base 9. A43480

Centered pentagonal numbers which are the products of four distinct primes. A382451

Number of nX4 0..1 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. A279130

Continued fraction for sqrt(667). A40641