Properties of the Number 64872

Sixty-Four Thousand Eight Hundred Seventy-Two

Basics

Value: 64871 → 64872 → 64873

Parity: even

Prime: No

Previous Prime: 64871

Next Prime: 64877

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ³ × 3 ² × 17 × 53

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 17, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111110101101000

Octal: 176550

Duodecimal: 31660

Hexadecimal: fd68

Square: 4208376384

Square Root: 254.69982332149348

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

Place n equally spaced points around the circumference of a circle and then, for each pair of points, draw two distinct circles, whose radii are the same as the first circle, such that both points lie on their circumferences. The sequence gives the total number of (curved) edges formed. A371375

Expansion of e.g.f. 1/(2 - x - exp(2·x)). A367835

Triangle T(n,k), read by rows n>=0 with terms k=1..3ⁿ, where row n lists the coefficients in the n-th iteration of x*(1+x)². A166888

Expansion of ∑_k>=0 x^k² / ∏_j=1..k (1 - x^j)^j. A318771

The minimal number which has multiplicative persistence 8 in base n. A64872

Triangle, read by rows, that transforms diagonals in the table of coefficients of successive iterations of x*(1+x)² (cf. A166888). A166890

Least positive integer k such that 1 + 1/2 + ... + 1/k > n/2. A226161