Properties of the Number 27421

Twenty-Seven Thousand Four Hundred Twenty-One

Basics

Value: 27420 → 27421 → 27422

Parity: odd

Prime: No

Previous Prime: 27409

Next Prime: 27427

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 17 × 1613

Divisors: 1, 17, 1613, 27421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110101100011101

Octal: 65435

Duodecimal: 13A51

Hexadecimal: 6b1d

Square: 751911241

Square Root: 165.59287424282482

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

Places k where A064608(k) (partial sums of unitary τ) is divisible by k. A64610

Number of noncongruent integer-sided tetrahedra with largest side n. A97125

Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w²<=x²+y². A211806

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 221", based on the 5-celled von Neumann neighborhood. A270936

Records in A095258. A350741

Number of noncrossing partitions of the n-set including a part containing both 1 and n (with n different from 1), with no pair of singletons {i} and {j} that can be merged into {i,j} and leave the partition a noncrossing partition. A373760

G.f. satisfies: A(x) = 1/(1 - x/A(-x·A(x)⁷)²). A213229

Triangle T(n,k) = number of distinct products i·j with k<=i,j<=n, for 0<=k<=n. A27421