Properties of the Number 75243

Seventy-Five Thousand Two Hundred Forty-Three

Basics

Value: 75242 → 75243 → 75244

Parity: odd

Prime: No

Previous Prime: 75239

Next Prime: 75253

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 3583

Divisors: 1, 3, 7, 21, 3583, 10749, 25081, 75243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010010111101011

Octal: 222753

Duodecimal: 37663

Hexadecimal: 125eb

Square: 5661509049

Square Root: 274.3045752443805

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

Expansion of x⁴*(1-x-x²)/((1+x)*(1-2·x)*(1-x-2·x²)). A219754

Rounded down ratio of area of a unit circle and one of the circles inscribed between a regular n-gon and a circumscribed unit circle. A244094

Number of Baxter matrices of size 3 X n. A347673

Number of length n arrays of permutations of 0..n-1 with each element moved by -5 to 5 places and the total absolute value of displacements not greater than 2*(n-1). A263902

a(0) = 0, and for n > 0, (a(n)) gives the indices n for which d(n) < d(k) for k < n, where d is the difference sequence of (cos k + sin k). A299640

T(n,k)=Number of length n arrays of permutations of 0..n-1 with each element moved by -k to k places and the total absolute value of displacements not greater than 2*(n-1). A263905

Composite numbers requiring increasingly larger bases to become prime by base reversal. A75243