Properties of the Number 19525

Nineteen Thousand Five Hundred Twenty-Five

Basics

Value: 19524 → 19525 → 19526

Parity: odd

Prime: No

Previous Prime: 19507

Next Prime: 19531

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 ² × 11 × 71

Divisors: 1, 5, 11, 25, 55, 71, 275, 355, 781, 1775

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100110001000101

Octal: 46105

Duodecimal: B371

Hexadecimal: 4c45

Square: 381225625

Square Root: 139.73188612482122

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

Centered dodecahedral numbers. A5904

Numbers n with property that A062234(n) = A062234(n+1) = A062234(n+2) = A062234(n+3). A257892

Index where prime(n) appears as a term in A379248. A379290

Column 3 of array in A226513. A226514

Sums of 5 distinct powers of 5. A38477

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 566", based on the 5-celled von Neumann neighborhood. A283063

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

1/n times A104631(n), the coefficient of x²ⁿ⁺¹ in the expansion of (1+x+x²+x³+x⁴)ⁿ. A104632

a(n) = 25*(5ⁿ - 1)/4. A168571

a(1) = 1, and for each k >=2, a(k) is the smallest number n such that n/sin(n) > a(k)/sin(a(k)), so that a(1)/sin(a(1)) > a(2)/sin(a(2)) > ... > a(k)/sin(a(k)) > ... A172445