Properties of the Number 41721

Forty-One Thousand Seven Hundred Twenty-One

Basics

Value: 41720 → 41721 → 41722

Parity: odd

Prime: No

Previous Prime: 41719

Next Prime: 41729

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 13907

Divisors: 1, 3, 13907, 41721

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010001011111001

Octal: 121371

Duodecimal: 20189

Hexadecimal: a2f9

Square: 1740641841

Square Root: 204.2571908158927

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

a(n) = floor( tan(m*π/2) ), where m = 1 - 2^-n. A24810

Composite numbers and 1 which yield a prime whenever a 7 is inserted anywhere in them, including at the beginning or end. A216168

Expansion of e.g.f. exp(2 * (1 - exp(-x)) + x). A335980

E.g.f. A(x) satisfies A(x) = 1 + (1 - exp(-x)) * A(2 * (1 - exp(-x))). A355123

Number of binary strings of length n with no substrings equal to 0000 0101 or 0110. A164432

Denominators of continued fraction convergents to sqrt(380). A41721