Properties of the Number 15725

Fifteen Thousand Seven Hundred Twenty-Five

Basics

Value: 15724 → 15725 → 15726

Parity: odd

Prime: No

Previous Prime: 15683

Next Prime: 15727

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 ² × 17 × 37

Divisors: 1, 5, 17, 25, 37, 85, 185, 425, 629, 925

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110101101101

Octal: 36555

Duodecimal: 9125

Hexadecimal: 3d6d

Square: 247275625

Square Root: 125.39936203984452

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 m that are the hypotenuse of exactly 22 distinct integer-sided right triangles, i.e., m² can be written as a sum of two squares in 22 ways. A97103

Numbers that are the sum of 2 nonzero squares in 5 or more ways. A25296

Numbers that are the sum of 2 nonzero squares in 6 or more ways. A25297

Numbers that are the sum of 2 distinct nonzero squares in 5 or more ways. A25315

Numbers that are the sum of 2 distinct nonzero squares in 6 or more ways. A25316

Numbers that set a record for occurrences as longest side of a primitive Heronian triangle. A306626

Numbers that are the sum of 2 nonzero squares in exactly 6 ways. A25289

a(n) = a(n - 1) - 2·a(n - 2) + a(n - 3) - 2·a(n - 4) + a(n - 5). A122582

a(n) = n*(n²+4). A155965

Smallest multiple of n beginning with the n-th prime. A78208