Properties of the Number 81075

Eighty-One Thousand Seventy-Five

Basics

Value: 81074 → 81075 → 81076

Parity: odd

Prime: No

Previous Prime: 81071

Next Prime: 81077

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 23 × 47

Divisors: 1, 3, 5, 15, 23, 25, 47, 69, 75, 115

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011110010110011

Octal: 236263

Duodecimal: 3AB03

Hexadecimal: 13cb3

Square: 6573155625

Square Root: 284.736720498077

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

Numbers k such that k*(k+1)-1 and k*(k+1)+1 are twin primes and k*(k+3)-1 and k*(k+3)+1 are also twin primes. A138303

Numbers with exactly one arithmetic progression of four successive divisors (not necessarily consecutive). A94530

Numbers k which can be split into two numbers·and y such that x³ + y² is a multiple of k. A162451

Number of binary strings of length n with no substrings equal to 0010 1001 or 1010. A164500

Number of 2 X 2 matrices having all terms in {1,...,n} and determinant d satisfying -n < d < n. A211070

Numbers k such that k=(a+b)*c=a·b+c for more than one triple (a,b,c) with 1<c<a<=b. A329169

a(n) = Fibonacci(4n+2) - 3. A81075