Properties of the Number 21279

Twenty-One Thousand Two Hundred Seventy-Nine

Basics

Value: 21278 → 21279 → 21280

Parity: odd

Prime: No

Previous Prime: 21277

Next Prime: 21283

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 41 × 173

Divisors: 1, 3, 41, 123, 173, 519, 7093, 21279

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001100011111

Octal: 51437

Duodecimal: 10393

Hexadecimal: 531f

Square: 452795841

Square Root: 145.87323263710857

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

Consider the Diophantine equation x³ + y³ = z³ + 1 (1 < x < y < z) or 'Fermat near misses'. Sequence gives values of z in monotonic increasing order. A50791

Integer c such that (a³ + b³ - c³)² = 1 where a,b,c are integers greater than 2. A281224

Number of partitions of 6 copies of n into distinct parts. A258284

Expansion of 1/((1-x)*(1-x²-x⁴)) + x/(1-3·x³). A169592

Number of decimal digits in the numerator of A003504(n). A389769

Expansion of 1/((1-x)(1-2x)(1-8x)(1-12x)). A21279