Properties of the Number 28141

Twenty-Eight Thousand One Hundred Forty-One

Basics

Value: 28140 → 28141 → 28142

Parity: odd

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 107 × 263

Divisors: 1, 107, 263, 28141

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111101101

Octal: 66755

Duodecimal: 14351

Hexadecimal: 6ded

Square: 791915881

Square Root: 167.75279431353744

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

Nonprime Heinz numbers of multiples of triangular partitions, or of finite arithmetic progressions with offset 0. A325407

Number of integer partitions of n whose length is a semi-sum of the parts. A367394

a(n) = prime(n) * prime(2n). A319613

Semiprimes in A054556. A113693

Sum of sums of omegas of the parts over all strict integer partitions of n. A325515

a(n) = the smallest positive integer that produces a product that contains the digit 2 when multiplied by 2 at most n times, and where a further multiplication by 2 produces a number that does not contain the digit 2. Set a(n) = -1 if no such number exists. A381183

Number of (w,x,y,z) with all terms in {1,...,n} and w<2x+y+z. A212145

Numbers k such that k³ - b2 is a triangular number (A000217), where b2 is the largest square less than k³. A233401

Nonprime numbers k such that if the least prime index of k is x, then all subsequent prime indices are 2x. A392700

a(n) = a(n-1) + a(n - 1 minus the number of terms of a(k) == (mod 5) so far). A60732