Properties of the Number 1289

One Thousand Two Hundred Eighty-Nine

Basics

Value: 1288 → 1289 → 1290

Parity: odd

Prime: Yes

Previous Prime: 1283

Next Prime: 1291

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 1289

Divisors: 1, 1289

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10100001001

Octal: 2411

Duodecimal: 8B5

Hexadecimal: 509

Square: 1661521

Square Root: 35.90264614203248

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

Lesser of twin primes. A1359

Sophie Germain primes p: 2p+1 is also prime. A5384

Primes of the form 2x² + 2xy + 17y². A139827

Square array of Delannoy numbers D(i,j) (i >= 0, j >= 0) read by antidiagonals. A8288

Primes of form 8n+1, that is, primes congruent to 1 mod 8. A7519

Primes whose binary representation is also the decimal representation of a prime. A65720

Primes of form 10·k + 9. A30433

Primes p such that p + 8 is also prime. A23202

Numbers whose sum of even digits and sum of odd digits are equal. A36301

Numbers whose sum of digits is 20. A235229