Properties of the Number 25243

Twenty-Five Thousand Two Hundred Forty-Three

Basics

Value: 25242 → 25243 → 25244

Parity: odd

Prime: Yes

Previous Prime: 25237

Next Prime: 25247

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 25243

Divisors: 1, 25243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001010011011

Octal: 61233

Duodecimal: 12737

Hexadecimal: 629b

Square: 637209049

Square Root: 158.88045820679145

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 subsets of {1...n} containing all prime indices of the elements. A324736

Euclid-Mullin sequence (A000945) with initial value a(1)=11 instead of a(1)=2. A51309

Numerators of successive approximations to ζ(3) = ∑_k>0 1/k³, using Zeilberger's formula with s=3. A84225

Discriminants of imaginary quadratic fields with class number 17 (negated). A46014

Primes p such that 2^p-1 and the p-th Fibonacci number have a common factor. Prime terms of A074776. A80050

Smallest prime such that the n preceding prime gaps are strictly decreasing and the n subsequent prime gaps strictly increasing. A248704

Numbers n such that n² = a² + b⁵ (with integers a, b > 0) and gcd(a, b, n) = 1. A293284

Diagonal sums of the Riordan matrix (g(x),x·g(x)), where g(x) = (1-x-sqrt(1-2·x-3·x²-4·x³))/(2·x²*(1+x)) (A190252). A190255

Expansion of (1/x) * Series_Reversion( x / ((1+x)³ * B(x)) ), where B(x) is the g.f. of A002293. A381910

Triangle read by rows: numerators of c_n,k, n >= 0, 0 <= k <= n, used in the proof that ζ(3) is irrational. A303988