Properties of the Number 87420

Eighty-Seven Thousand Four Hundred Twenty

Basics

Value: 87419 → 87420 → 87421

Parity: even

Prime: No

Previous Prime: 87407

Next Prime: 87421

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 31 × 47

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010101111100

Octal: 252574

Duodecimal: 42710

Hexadecimal: 1557c

Square: 7642256400

Square Root: 295.6687335515881

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 (w,x,y,z) with all terms in {1,...,n} and median<=mean. A212134

Triangle read by rows: T(n,k) = round(c(n)/(c(k)*c(n-k))) where c are partial products of a sequence defined in comments. A172364

a(n) is the sum of the squares of the sizes of the conjugacy classes in the dihedral group D_2n. A87420