Properties of the Number 65921

Sixty-Five Thousand Nine Hundred Twenty-One

Basics

Value: 65920 → 65921 → 65922

Parity: odd

Prime: Yes

Previous Prime: 65899

Next Prime: 65927

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 65921

Divisors: 1, 65921

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000000110000001

Octal: 200601

Duodecimal: 32195

Hexadecimal: 10181

Square: 4345578241

Square Root: 256.7508519946915

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

a(n) = 4ⁿ⁺¹ + 3·2ⁿ + 1. A36562

Numbers k such that k² is palindromic in base 4. A29986

Noncomposite numbers in the southern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American. A168027

Primes of the form 2^{2^k}+385. A160030

Number of pieces after a sheet of paper is folded n times and cut diagonally. A257418

a(0)=3; for n > 0, a(n) = 2^2·n + 3·2^n-1 + 1. A343176

Let p run through the primes; write p in base 10 and then interpret it in base 128 getting a number q; if q is prime then adjoin q to the sequence. A90718

Number of 2-connected (or biconnected) graphs on n nodes with chromatic number 2. A126750

Bessel polynomial {y_n}'(3). A65921

Integers n such that each of n, n + 1, n + 2, n + 4, n + 5, n + 6 is the squarefree product of three primes. A242805