Properties of the Number 1229

One Thousand Two Hundred Twenty-Nine

Basics

Value: 1228 → 1229 → 1230

Parity: odd

Prime: Yes

Previous Prime: 1223

Next Prime: 1231

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 1229

Divisors: 1, 1229

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10011001101

Octal: 2315

Duodecimal: 865

Hexadecimal: 4cd

Square: 1510441

Square Root: 35.05709628591621

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 having only {1, 2, 9} as digits. A385776

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

Number of primes < 10ⁿ. A6880

Primes of form 10·k + 9. A30433

a(n) = 4*(n+1)*n + 5. A78370

Primes that become another prime under the map 1 <-> 0 (acting on the digits: A222210), cf. A171013. A175791

Primes that become a different prime under the mapping 0 <=> 2. A180517

Numbers n such that n, 2n+1, and 4n+3 all prime. A7700