Properties of the Number 75725

Seventy-Five Thousand Seven Hundred Twenty-Five

Basics

Value: 75724 → 75725 → 75726

Parity: odd

Prime: No

Previous Prime: 75721

Next Prime: 75731

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 13 × 233

Divisors: 1, 5, 13, 25, 65, 233, 325, 1165, 3029, 5825

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010011111001101

Octal: 223715

Duodecimal: 379A5

Hexadecimal: 127cd

Square: 5734275625

Square Root: 275.1817581163403

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 n such that the decimal expansions of both n and n² have 2 as smallest digit and 7 as largest digit. A257123

Euler transform of Lucas numbers. A261031

Number of ways to split 1, 2, 3, ..., 7n into n arithmetic progressions each with 7 terms. A104433

Markoff spectrum N⁵(λ). A293173

Number of (n+1) X (2+1) arrays of permutations of 0..n·3+2 with each element having directed index change 0,1 0,-2 1,0 or -1,0. A264294

Number of nonempty subsets of {1,2,...,n} in which exactly 1/5 of the elements are <= (n-3)/3. A48032

a(n) = (4·n² + 2·n - 3)*(2·n - 1)*n/3. A58581

Number of n-vertex, 2-edge multigraphs that are not nesting. Number of n-vertex, 2-edge multigraphs that are not crossing. A326278

G.f. A(x) satisfies: A(x) = x + A( x·A(x) + x·A(x)³ ). A271843

Duplicate of A049407. A75725