Properties of the Number 68520

Sixty-Eight Thousand Five Hundred Twenty

Basics

Value: 68519 → 68520 → 68521

Parity: even

Prime: No

Previous Prime: 68507

Next Prime: 68521

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 571

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10000101110101000

Octal: 205650

Duodecimal: 337A0

Hexadecimal: 10ba8

Square: 4694990400

Square Root: 261.7632518135424

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

Branched catafusenes (cata-condensed benzenoids) without helicenes, symmetry C_s. A323923

Row sums of A163334 and A163336. A163342

Number of collections of nonempty multisets with a total of n objects of exactly two colors. A255942

Number of dihedral Carlitz compositions of n. A292906

Expansion of e.g.f. exp( x²/(1-x)³ ) / (1-x)². A375224

Expansion of e.g.f. (1-x)/(1-4·x+x²). A52677

Expansion of x*(1 + x² - x³) / ( (1-x)*(1-x-x⁴) ). A168639

Numbers k such that (11·10^k - 149)/3 is prime. A281486

Numbers n which can be transformed into a true arithmetic statement by inserting zero or more parentheses and elementary arithmetic operators ((, ), +, -, *, /) and one equality sign (=) as the rightmost insertion into the decimal representation of n. A68520

Number of (n+1)X(3+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise. A235957