Properties of the Number 16243

Sixteen Thousand Two Hundred Forty-Three

Basics

Value: 16242 → 16243 → 16244

Parity: odd

Prime: No

Previous Prime: 16231

Next Prime: 16249

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 37 × 439

Divisors: 1, 37, 439, 16243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111101110011

Octal: 37563

Duodecimal: 9497

Hexadecimal: 3f73

Square: 263835049

Square Root: 127.44802862343536

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) = n*(2·n² -3·n +7)/6 = C(n, 1) + C(n, 2) + 2·C(n, 3). A81489

Greatest n-bit number whose binary representation's substrings represent the maximal number (A112509(n)) of distinct integers. A112511

Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. -log(1 - f^k-1(x)), where f(x) = log(1+x). A351420

a(n) = sum of the first n lower twin primes. A86167

Numbers k such that 2^k+1 + 2·k + 1 is prime. A105330

Numbers that define integer Heronian triangles [prime(a(n)), prime(a(n)+1), A068965(n)] with area A068966(n). A68964

Real part of ∑_k=0..n (k + i^k)², where i=sqrt(-1). A236377

Number of n-node unlabeled rooted trees with thickening limbs. A245152

Number of compositions of n such that the maximal distance between two identical parts equals one. A262192

Expansion of e.g.f. -log(1 - log(1 + log(1 + log(1 + log(1+x))))). A351423