Properties of the Number 84721

Eighty-Four Thousand Seven Hundred Twenty-One

Basics

Value: 84720 → 84721 → 84722

Parity: odd

Prime: No

Previous Prime: 84719

Next Prime: 84731

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 7 ³ × 13 × 19

Divisors: 1, 7, 13, 19, 49, 91, 133, 247, 343, 637

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100101011110001

Octal: 245361

Duodecimal: 41041

Hexadecimal: 14af1

Square: 7177647841

Square Root: 291.0687204080851

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

Number of achiral color patterns (set partitions) in a row or cycle of length n with 5 or fewer colors (subsets). A305751

Numbers of the form (q1^b1)(q2^b2)(q3^b3)(q4^b4)(q5^b5)... where q1=7, q2=13, q3=19, q4=31, q5=37, ... (A002476) and b1>=b2>=b3>=b4>=b5... A344473

Numbers k such that A003415(k) == A276085(k) (mod 5⁵), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function. A391865

Records in A071786. A151766

Number of length-n 0..2 arrays with no repeated value differing from the previous repeated value by one. A269488

Triangle read by rows: T(n,k) (for 0 <= k <= floor(n/2)) is the number of permutations of length n that have k descents and avoid the patterns 321 and 2341. A304429

Primes arising in A083569. A84721