Properties of the Number 15206

Fifteen Thousand Two Hundred Six

Basics

Value: 15205 → 15206 → 15207

Parity: even

Prime: No

Previous Prime: 15199

Next Prime: 15217

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 7603

Divisors: 1, 2, 7603, 15206

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101101100110

Octal: 35546

Duodecimal: 8972

Hexadecimal: 3b66

Square: 231222436

Square Root: 123.31261087171903

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) = ∑_k=n..2·n T(n,k), T given by A027052. A27067

Number of cycles of length 4 in the queen graph associated with an n X n chessboard. A156001

Numbers k such that 4·10^k + 3·R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k. A56707

Triangle read by rows: T(n,k) is number of Dyck paths of semilength n having k ascents of length 1 starting at an even level. A102404

The n-th number m such that a nontrivial prime(n)-th root of unity modulo m exists. A305828

Triangle read by rows: Trace of the Akiyama-Tanigawa algorithm for powers x³. A371764

a(n) = floor((xⁿ - (1-x)ⁿ)/sqrt(2)+ 1/2) where x = (sqrt(2)+1)/2. A136421

Least numbers k for each base b >= 2 such that N = b^2ⁿ + k is prime for 6 consecutive values from n = 0 to n = 5. A225492

a(n) = A371764(n, 2). A372148

Number of forests with at most n unlabeled nodes. A386399