Properties of the Number 84420

Eighty-Four Thousand Four Hundred Twenty

Basics

Value: 84419 → 84420 → 84421

Parity: even

Prime: No

Previous Prime: 84407

Next Prime: 84421

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 5 × 7 × 67

Divisors: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100100111000100

Octal: 244704

Duodecimal: 40A30

Hexadecimal: 149c4

Square: 7126736400

Square Root: 290.551200307278

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

Positive numbers m such that m² - 1 divides 2^m - 1. A247219

Positive numbers m such that m² - 1 divides 4^m - 1. A271842

Expansion of 1/(1 - x² - 2 x³ + x⁴). A122512

Least number k such that between k! and (k+1)! there are n powers of ten. A84420

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