Properties of the Number 15247

Fifteen Thousand Two Hundred Forty-Seven

Basics

Value: 15246 → 15247 → 15248

Parity: odd

Prime: No

Previous Prime: 15241

Next Prime: 15259

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 79 × 193

Divisors: 1, 79, 193, 15247

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101110001111

Octal: 35617

Duodecimal: 89A7

Hexadecimal: 3b8f

Square: 232471009

Square Root: 123.47874310989727

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

Values of n such that L(20) and N(20) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227523

Nonprime Heinz numbers of multiples of triangular partitions, or of finite arithmetic progressions with offset 0. A325407

Numbers k such that τ(k) = τ(k+1) mod 691, where τ is Ramanujan's τ function A000594. A121733

a(n) = 14·n² + 1. A158482

a(n) = prime(n) * prime(2n). A319613

Restricted partitions. A49285

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n) + 2·n, where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A294170

Products of exactly two distinct primes in A090252, in order of appearance. A354160

After the initial 1, numbers k such that A347381 obtains its minimum value at k, of all the divisors d of k larger than one, where A347381 is the distance from n to the nearest common ancestor of n and σ(n) in the Doudna-tree (A005940). A374218

a(n) = a(n-1) * a(n-1) - B·a(n-1) + B, a(0) = 1 + B for B = 7. A67686