Properties of the Number 65021

Sixty-Five Thousand Twenty-One

Basics

Value: 65020 → 65021 → 65022

Parity: odd

Prime: No

Previous Prime: 65011

Next Prime: 65027

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 11 × 23 × 257

Divisors: 1, 11, 23, 253, 257, 2827, 5911, 65021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110111111101

Octal: 176775

Duodecimal: 31765

Hexadecimal: fdfd

Square: 4227730441

Square Root: 254.99215674212414

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

Expansion of (1/x) * Series_Reversion( x / ((1+x)⁴+x²) ). A369213

Quasi-Carmichael numbers to base 5: squarefree composites n such that (n,2·3) = 1 and prime p∣n ==> p-5∣n-5. A29558

a(n) = n * (2·n + 1) * (6·n² + 4·n + 1) / 3. A132123

a(n) = 100·n² + 100·n + 21. A152161

a(n) = (8·n+5)*(8·n+9). A146302

Integers k whose binary expansion (D digits in length) is the same as the initial D digits of the binary expansion of the square root of k to the right of the binary point. A165309

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 3", based on the 5-celled von Neumann neighborhood. A269911

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 961", based on the 5-celled von Neumann neighborhood. A273832

Primes p such that 2·p + 11 is a square. A269784

Duplicate of A048652. A65021