Properties of the Number -21139

Twenty-One Thousand One Hundred Thirty-Nine

Basics

Value: -21140 → -21139 → -21138

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 21139

Divisors: 1, 21139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001010010011

Octal: -51223

Duodecimal: -10297

Hexadecimal: -5293

Square: 446857321

Square Root: 145.3925720248459

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

The sum of the sequence starting with prime(n) and having prime sum defined in A071194, or -1 if no such sequence exists. A71196

a(n) = n³ - n² - n - 1. A83074

Primes of the form p = prime(k) = (prime(k+3)+prime(k-1))/2. A126238

Primes of the form k³-k²-k-1. A162295

Sequence A001033 gives the numbers n such that the sum of the squares of n consecutive odd numbers x² + (x+2)² + ... +(x+2n-2)² = k² for some integer k. For each n, this sequence gives the least value of x. A56131

Numbers appearing in A214208 excluding powers 2ⁱ with i>0. A214209

Denominators of the continued fraction convergents of log₁₀(11). A215756

Largest prime that can be obtained from n by successively appending digits to the right with the constraint that each of the numbers obtained that way must be prime; a(n)=0 if there is no such prime at all. A232129

Primes p that p//13 and p//31 are consecutive primes. A176601

Primes with eight embedded primes. A179916