Properties of the Number 68121

Sixty-Eight Thousand One Hundred Twenty-One

Basics

Value: 68120 → 68121 → 68122

Parity: odd

Prime: No

Previous Prime: 68113

Next Prime: 68141

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 29 ²

Divisors: 1, 3, 9, 27, 29, 81, 87, 261, 783, 841

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000101000011001

Octal: 205031

Duodecimal: 33509

Hexadecimal: 10a19

Square: 4640470641

Square Root: 261

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 with prime factorization p²*q⁴. A189988

a(n) = (10·n + 1)². A17282

a(n) = (11·n + 8)². A17486

Squares with initial digit '6'. A45789

Least square n-gonal number greater than 1, or 0 if none exists. A100252

Numbers with 15 divisors. A30633

T(n,k)=Number of nXk 0..1 arrays with all rows and columns having a nonnegative second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative. A223227

Numbers n such that n!8-2 is prime. A204664

Squares whose largest digit is 8. A295018

a(n) = (8·n + 5)². A17126