Properties of the Number 56665

Fifty-Six Thousand Six Hundred Sixty-Five

Basics

Value: 56664 → 56665 → 56666

Parity: odd

Prime: No

Previous Prime: 56663

Next Prime: 56671

Digit Sum: 28

Digital Root: 1

Palindrome: Yes

Factorization: 5 × 7 × 1619

Divisors: 1, 5, 7, 35, 1619, 8095, 11333, 56665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101110101011001

Octal: 156531

Duodecimal: 28961

Hexadecimal: dd59

Square: 3210922225

Square Root: 238.04411355881078

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

Palindromes n such that n and n² have same digit sum. A58852

Start with a(1)=4; apply 4 -> 665, 5 -> 56665, 6 -> 566665; iterate. A81261

Palindromes p = A002113(n) whose index n is a substring of p. A248753

Palindromes p=A002113(n) whose index n is also a palindrome and in addition a substring of p (strings in base 10). A248754

Number of equivalence classes of n-valued Post functions of 1 variable under action of complementing group C(1,n). A56665