Properties of the Number 84421

Eighty-Four Thousand Four Hundred Twenty-One

Basics

Value: 84420 → 84421 → 84422

Parity: odd

Prime: Yes

Previous Prime: 84407

Next Prime: 84431

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 84421

Divisors: 1, 84421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10100100111000101

Octal: 244705

Duodecimal: 40A31

Hexadecimal: 149c5

Square: 7126905241

Square Root: 290.55292116927683

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

Primes p such that p*(p-2) divides 2^p-1-1. A81762

Primes of the form x³ + y³ + 1, where·and y are primes. A214175

Numbers n such that (n-1)²-1 divides 2^n-1-1. A260406

Primes p such that 2·p + 79 is a square. A269790

a(n) = A005187(A000040(n)). A84421

Least positive integer k such that both k and k·n belong to the set {m>0: prime(m) = prime(p)+2 for some prime p}. A261295

Numbers k such that (76·10^k - 211)/9 is prime. A293189