Properties of the Number 1243

One Thousand Two Hundred Forty-Three

Basics

Value: 1242 → 1243 → 1244

Parity: odd

Prime: No

Previous Prime: 1237

Next Prime: 1249

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 11 × 113

Divisors: 1, 11, 113, 1243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011011011

Octal: 2333

Duodecimal: 877

Hexadecimal: 4db

Square: 1545049

Square Root: 35.25620512760839

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

Toothpick sequence (see Comments lines for definition). A139250

Number of knapsack partitions of n. A108917

Generalized heptagonal numbers: m*(5·m - 3)/2, m = 0, +-1, +-2 +-3, ... A85787

a(n) = 4·n² - 3·n + 1. A54552

Discriminants of imaginary quadratic fields with class number 4 (negated). A13658

Number of partitions of n into 3 or more parts. A4250

Odd numbers not of form p + 2^k (de Polignac numbers). A6285

Decimal representation of permutations of lengths 1, 2, 3, ... arranged lexicographically. A30299

Second heptagonal numbers: a(n) = n*(5·n+3)/2. A147875

Numbers that are the sum of 11 positive 6th powers. A3367