Properties of the Number 39825

Thirty-Nine Thousand Eight Hundred Twenty-Five

Basics

Value: 39824 → 39825 → 39826

Parity: odd

Prime: No

Previous Prime: 39821

Next Prime: 39827

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 ² × 59

Divisors: 1, 3, 5, 9, 15, 25, 27, 45, 59, 75

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101110010001

Octal: 115621

Duodecimal: 1B069

Hexadecimal: 9b91

Square: 1586030625

Square Root: 199.56202043475105

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

Numbers m such that there are precisely 17 groups of order m. A294949

Riordan array ((1-x²)/(1+3x+x²),x/(1+3x+x²)). A110168

Triangle read by rows: characteristic polynomials of certain matrices, see Mathematica program. A124040

Numbers k such that (13·10^k + 47) / 3 is prime. A279549

a(n) = floor((n² + n + 8) / 4). A39825

Smallest number with exactly n representations as sum of a squarefree number (A005117) and a square (A000290). A85264