Properties of the Number 15129

Fifteen Thousand One Hundred Twenty-Nine

Basics

Value: 15128 → 15129 → 15130

Parity: odd

Prime: No

Previous Prime: 15121

Next Prime: 15131

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 41 ²

Divisors: 1, 3, 9, 41, 123, 369, 1681, 5043, 15129

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101100011001

Octal: 35431

Duodecimal: 8909

Hexadecimal: 3b19

Square: 228886641

Square Root: 123

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

Squares of the squarefree semiprimes (p²*q²). A85986

a(n) = a(n-1) + a(n-2) - 2, a(0) = 4, a(1) = 3. A211

Squares of Lucas numbers. A1254

a(n) = (3·n)². A16766

a(n) and floor(a(n)/5) are both squares; i.e., squares which remain squares when written in base 5 and last digit is removed. A55812

Squares n² such that floor(n²/9) is again a square. A204503

Numbers with 9 divisors. A30627

a(n) = Fibonacci(2·n+1) + Fibonacci(2·n-1) + 2. A92387

a(n) = (6·n+3)². A16946

Numbers m² for which the center part (containing the diagonal) of its symmetric representation of σ, SRS(m²), has width 1 and area m. A377654