Properties of the Number 84221

Eighty-Four Thousand Two Hundred Twenty-One

Basics

Value: 84220 → 84221 → 84222

Parity: odd

Prime: Yes

Previous Prime: 84211

Next Prime: 84223

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 84221

Divisors: 1, 84221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100100011111101

Octal: 244375

Duodecimal: 408A5

Hexadecimal: 148fd

Square: 7093176841

Square Root: 290.2085457046363

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

Lesser of twin self primes, i.e., smaller member of the pair of self primes differing by 2. A380713

Primes whose position in the Wythoff array is immediately followed by a prime both in the next column and the next row. A352537

Define f(n,k) = floor[n/k] and a(n) = right concatenation of f(n,k) for k = 1 to int[(n+1)/2] or until one arrives at a 1. A68671

Primes in A068671. A68672

Lesser of two Pythagorean primes for which the Pythagorean triangles have the same area. A157184

Number of n X 5 binary arrays with each 1 adjacent to exactly one 1 vertically and one 1 horizontally. A183337

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 52. A31640

a(n+2) = 4·a(n), with a(0)=1, a(1)=3. A84221