Properties of the Number 39975

Thirty-Nine Thousand Nine Hundred Seventy-Five

Basics

Value: 39974 → 39975 → 39976

Parity: odd

Prime: No

Previous Prime: 39971

Next Prime: 39979

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 ² × 13 × 41

Divisors: 1, 3, 5, 13, 15, 25, 39, 41, 65, 75

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110000100111

Octal: 116047

Duodecimal: 1B173

Hexadecimal: 9c27

Square: 1598000625

Square Root: 199.93749023132204

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

Number of distinct regions among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass. A359046

a(n) = 625·n² - 25. A157918

a(n) = 64·n² - n. A157948

The Wiener index of the Dutch windmill graph D(5,n) (n>=1). A180579

a(n) = n⁴/8 + (5·n³)/12 - n²/8 - (5·n)/12 + 1. A226639

a(n) = (n + 1)*(6·n⁴ - 21·n³ + 31·n² - 31·n + 30)/30. A267691

An example of a d-perfect sequence: a(n) = A006318(n-1) mod 3. A39975