Properties of the Number 25570

Twenty-Five Thousand Five Hundred Seventy

Basics

Value: 25569 → 25570 → 25571

Parity: even

Prime: No

Previous Prime: 25561

Next Prime: 25577

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 2557

Divisors: 1, 2, 5, 10, 2557, 5114, 12785, 25570

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001111100010

Octal: 61742

Duodecimal: 1296A

Hexadecimal: 63e2

Square: 653824900

Square Root: 159.90622251807463

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

Expansion of ∏_k>=1 1/(1 - x^prime(k))². A298436

Length of cycles obtained by repeated application of the strip bijection for the triangular lattice (A367147), sorted by increasing minimum radius visited by any cycle of this length. A367149

Numbers that contain as proper substrings every maximal prime power dividing them. A59401

Number of n X 7 0..1 arrays with every element unequal to 0, 1 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A299594

Convolution of odd numbers and A000201. A23658

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A299595

Numbers k such that k⁴ = a⁴ + b⁴ + c⁴ + d⁴ has at least two positive primitive solutions. A331675

a(n) = T(2n,n), where T is the array defined in A025564. A25570