Properties of the Number 84666

Eighty-Four Thousand Six Hundred Sixty-Six

Basics

Value: 84665 → 84666 → 84667

Parity: even

Prime: No

Previous Prime: 84659

Next Prime: 84673

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 103 × 137

Divisors: 1, 2, 3, 6, 103, 137, 206, 274, 309, 411

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100101010111010

Octal: 245272

Duodecimal: 40BB6

Hexadecimal: 14aba

Square: 7168331556

Square Root: 290.9742256626865

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

Triangular numbers with only even digits. A117978

Triangular numbers composed of digits {4,6,8}. A119212

Numbers of the form prime(n) + prime(n+1) - 2 that are also triangular numbers, T(k) = k(k+1)/2. A110891

Smallest triangular number whose decimal expansion ends (nontrivially) with the n-th triangular number. A229262

Numbers that start a run of four consecutive triangular numbers with four distinct prime factors. A349773

Indices of the Sylvester primes (A375543) in the primes (A000040). A375545

Triangular numbers all of whose digits are nonprimes. A111484

Hexagonal numbers that are products of exactly four distinct primes. A381920

Lunar primes that are also rational primes. A84666