Properties of the Number 78123

Seventy-Eight Thousand One Hundred Twenty-Three

Basics

Value: 78122 → 78123 → 78124

Parity: odd

Prime: No

Previous Prime: 78121

Next Prime: 78137

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 26041

Divisors: 1, 3, 26041, 78123

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011000100101011

Octal: 230453

Duodecimal: 39263

Hexadecimal: 1312b

Square: 6103203129

Square Root: 279.50491945581206

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

Numbers k such that (k+j) mod (2+j) = 1 for j from 0 to 8 and (k+9) mod 11 <> 1. A96026

a(n) is the smallest number not yet in the sequence such that concatenation of all terms yields an infinite periodic stream of digits 1, 2, 3, ..., 8 (repeat from 1). A165306

Semiprime nearest to 5ⁿ. In case of a tie, choose the smaller. A117429

a(n) = 2*(-1)ⁿ - (-5)ⁿ. A81628

a(n) = number of solutions to the Diophantine equation x+y²+z³=n⁴ with positive x,y,z all distinct. A121984

Numbers, a(n) where binomial(a(n), 5n-1) == 0 (mod 5) and binomial(a(n), k) ≠ 0 (mod 5) for k ≠ 5n - 1. A224251

Smallest prime of the form kⁿ-2. A95304

Square of infinite lower triangular matrix A078122. A78123