Properties of the Number 81874

Eighty-One Thousand Eight Hundred Seventy-Four

Basics

Value: 81873 → 81874 → 81875

Parity: even

Prime: No

Previous Prime: 81869

Next Prime: 81883

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 13 × 47 × 67

Divisors: 1, 2, 13, 26, 47, 67, 94, 134, 611, 871

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111010010

Octal: 237722

Duodecimal: 3B46A

Hexadecimal: 13fd2

Square: 6703351876

Square Root: 286.136331143041

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

Rademacher's partition formula extended to half-integers. a(n) = round(sqrt(48) * (cosh(h(n)) - sinh(h(n))/h(n)) / (24·n + 11)) where h(n) = sqrt(24·n + 11)*(π/6). A376876

a(n) is the number of digits in the decimal representation of the smallest power of 2 that contains n consecutive identical digits. A217185

Ordered odd short legs of primitive Pythagorean triangles. A81874