Properties of the Number 25205

Twenty-Five Thousand Two Hundred Five

Basics

Value: 25204 → 25205 → 25206

Parity: odd

Prime: No

Previous Prime: 25189

Next Prime: 25219

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 71 ²

Divisors: 1, 5, 71, 355, 5041, 25205

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001001110101

Octal: 61165

Duodecimal: 12705

Hexadecimal: 6275

Square: 635292025

Square Root: 158.76082640248507

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

Numbers k such that σ(k) = ψ(k) + τ(k). A387953

Composite numbers k such that σ(k) / d(k) is prime. A48969

Triangle T(n,k) giving the smallest term in "the infinite trunk of factorial beanstalk" (A219666) whose factorial base representation contains n digits (A084558) and the most significant such digit (A099563) is k. A230428

Numbers of the form p²*q, with odd primes p > q, such that q divides p-1. A350638

Largest number whose factorial is less than 10^10ⁿ. A119906

Values of c such that (c+9·b)*Prime(n)#-1 is the least prime such that (c+k·b)*Prime(n)#-1 is prime for k=0 to 9 with c+9·b < Prime(n)# , or 0 if no solution. Prime(n)#=n-th primorial. A188366

Starting positions of strings of 3 1's in the decimal expansion of π. A50209

Number of ways prime(n) can be expressed as the sum of distinct smaller noncomposites. A215966

Number of Motzkin meanders of length n with an even number of peaks. A307575

Numbers k that divide s(k), where s(1)=1, s(j)=5·s(j-1)+j. A14852