Properties of the Number 12481

Twelve Thousand Four Hundred Eighty-One

Basics

Value: 12480 → 12481 → 12482

Parity: odd

Prime: No

Previous Prime: 12479

Next Prime: 12487

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 7 × 1783

Divisors: 1, 7, 1783, 12481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011000001

Octal: 30301

Duodecimal: 7281

Hexadecimal: 30c1

Square: 155775361

Square Root: 111.71839597846005

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 of intersections of diagonals in the interior of a regular n-gon. A6561

Centered 16-gonal numbers. A69129

T(n,k)=Number of length n+4 0..k arrays with some pair in every consecutive five terms totalling exactly k. A246892

Semiprimes in A003215. A113530

Sum of the legs of the unique primitive Pythagorean triple whose inradius is A000217(n) and such that its long leg and its hypotenuse are consecutive natural numbers. A383834

Numbers n such that the decimal number concat(3,n) is a square. A273358

Number of partitions of 3-smooth numbers into parts not greater than 3. A117220

Fourth powers (n·n * n·n) in carryless arithmetic mod 10. A169886

E.g.f. A(x) satisfies A(x) = exp(x + x³*A''(x)). A385066

a(n) = ∑_{k=0..floor(2·n/7)} binomial(2·k+1,2·n-7·k). A392456