Properties of the Number 20525

Twenty Thousand Five Hundred Twenty-Five

Basics

Value: 20524 → 20525 → 20526

Parity: odd

Prime: No

Previous Prime: 20521

Next Prime: 20533

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 ² × 821

Divisors: 1, 5, 25, 821, 4105, 20525

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000000101101

Octal: 50055

Duodecimal: BA65

Hexadecimal: 502d

Square: 421275625

Square Root: 143.26548781894402

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

House numbers: a(n) = (n+1)³ + ∑_i=1..n i². A51662

Number of noncrossing path sets on n nodes up to rotation and reflection with each path having at least two nodes. A303839

Numbers k such that 3·2^k - 7 is prime. A59747

Number of ordinary double points of a family of threefolds. A294604

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 15. A31603

a(n) = 5th Euler polynomial evaluated at 2ⁿ and multiplied by 2. A20525

Number of length 2+5 0..n arrays with no disjoint triples in any consecutive six terms having the same sum. A247997