Properties of the Number 21601

Twenty-One Thousand Six Hundred One

Basics

Value: 21600 → 21601 → 21602

Parity: odd

Prime: Yes

Previous Prime: 21599

Next Prime: 21611

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 21601

Divisors: 1, 21601

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010001100001

Octal: 52141

Duodecimal: 10601

Hexadecimal: 5461

Square: 466603201

Square Root: 146.972786596703

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

T(n,k)=Number of length n+4 0..k arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two. A248987

Prime number spiral (clockwise, North spoke). A54551

Array read by antidiagonals: T(m,n) = number of minimal dominating sets in the rook graph K_m X K_n. A290632

Half-quartan primes: primes of the form p = (x⁴ + y⁴)/2. A2646

Primes that are palindromic in base 12. A29979

Primes p of the form 4·k+1 for which s=26 is the least positive integer such that s·p-(floor(sqrt(s·p)))² is a square. A145050

Primes of the form k² - 8. A28886

Primes of the form 6·k² + 1. A90687

a(n) = n³ + 71·n + 1. A124363

Primes p for which the period length of 1/p is a perfect power, A001597. A128948