Properties of the Number 25998

Twenty-Five Thousand Nine Hundred Ninety-Eight

Basics

Value: 25997 → 25998 → 25999

Parity: even

Prime: No

Previous Prime: 25997

Next Prime: 25999

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 619

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 619, 1238

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010110001110

Octal: 62616

Duodecimal: 13066

Hexadecimal: 658e

Square: 675896004

Square Root: 161.23895310997278

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 distinct intersections among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass. A331702

Numbers k such that k³ - 1 and k³ + 1 are both semiprimes. A268043

Start with 83; if even, divide by 2; if odd, add next three primes: Orbit of 83 under iterations of A174221, the "PrimeLatz" map. A293979

Numbers on the square spiral board that are enclosed by four primes. A341542

Numbers k such that 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)-1 and 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)+1 are twin primes with p(h) = h-th prime. A129310

a(n) = number of triangles with integer sides i <= j <= k with radius of circumcircle <= n. A331229

Numbers k such that 6^k + 3^k + 2^k = A074528(k) is a prime. A125706

Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral. A172294

Number of nonempty subsets of {1, 2, ..., n} with <=7 pairwise coprime elements. A187268

Squarefree numbers n such that n² + 1 and n² - 1 are semiprime. A268697