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Properties of the Number 28421

Twenty-Eight Thousand Four Hundred Twenty-One

Basics

Value: 28420 → 28421 → 28422

Parity: odd

Prime: No

Previous Prime: 28411

Next Prime: 28429

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 97 × 293

Divisors: 1, 97, 293, 28421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111100000101

Octal: 67405

Duodecimal: 14545

Hexadecimal: 6f05

Square: 807753241

Square Root: 168.5852899869974

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

Composite numbers k coprime to 13 such that k divides A006190(k-Kronecker(13,k)). A327653
Odd composite integers m such that A006497(m) == 3 (mod m). A335669
Composite numbers k coprime to 13 such that k divides A006190(k) - Kronecker(13,k). A327654
Odd composite integers m such that U(m)2 == 1 (mod m) and V(m) == 3 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=3 and b=-1, respectively. A337626
Numbers n such that A229964(n) = 3. A229966
Intersection of A327653 and A327654. A327655
Odd composite integers m such that U(m)2 == 1 (mod m) and V(m) == 4 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=4 and b=-1, respectively. A337627
Revrepfigits (reverse replicating Fibonacci-like digits): Numbers k whose reversal occurs in a sequence generated by starting with the k digits of a number and then continuing the sequence with a number that is the sum of the previous k terms. A97060
Odd composite integers m such that A000032(3·m-J(m,5)) == 3·J(m,5) (mod m), where J(m,5) is the Jacobi symbol. A339724
Odd composite integers m such that A000045(3·m-J(m,5)) == 1 (mod m), where J(m,5) is the Jacobi symbol. A340235