Properties of the Number 25505

Twenty-Five Thousand Five Hundred Five

Basics

Value: 25504 → 25505 → 25506

Parity: odd

Prime: No

Previous Prime: 25471

Next Prime: 25523

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 5101

Divisors: 1, 5, 5101, 25505

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001110100001

Octal: 61641

Duodecimal: 12915

Hexadecimal: 63a1

Square: 650505025

Square Root: 159.70284906663375

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

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having two distinct values, and new values 0..3 introduced in row major order. A209814

Minimal natural number (in decimal representation) with n prime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime). A217303

Numbers k such that k and k² use only the digits 0, 2, 3, 5 and 6. A136888

Numbers k such that k and k² use only the digits 0, 2, 5 and 6. A136911

Numbers k such that k and k² use only the digits 0, 2, 5, 6 and 7. A136912

Numbers k such that k and k² use only the digits 0, 2, 5, 6 and 8. A136913

Numbers k such that k and k² use only the digits 0, 2, 5, 6 and 9. A136914

Number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock having two distinct values, and new values 0..3 introduced in row major order. A209808

Number of (n+1)X5 0..3 arrays with every 2X2 subblock having two distinct values, and new values 0..3 introduced in row major order. A209810

Index of n-th 2 in A006928. A25505