Properties of the Number -201642

Two Hundred One Thousand Six Hundred Forty-Two

Basics

Value: -201643 → -201642 → -201641

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 4801

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 4801, 9602

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001001110101010

Octal: -611652

Duodecimal: -98836

Hexadecimal: -313aa

Square: 40659496164

Square Root: 449.0456546944865

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 T(n,k) of Dyck paths of semilength n having exactly k (possibly overlapping) occurrences of the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)); triangle T(n,k), n>=0, 0<=k<=max(0,floor((n-1)/4)), read by rows. A243881

Number of Dyck paths of semilength n avoiding the consecutive steps UDUUUDDDUD (with U=(1,1), D=(1,-1)). A243870

E.g.f. A(x) satisfies A(x) = 1 + x²*exp(x)*A(x)³. A390647

Initial seeds·which will enter a cycle of length 4 under the iteration of x -> A063919(x), the sum of proper unitary divisors. A98187

The number of 123-avoiding simple involutions of length n. A230557