Properties of the Number 4545

Four Thousand Five Hundred Forty-Five

Basics

Value: 4544 → 4545 → 4546

Parity: odd

Prime: No

Previous Prime: 4523

Next Prime: 4547

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 101

Divisors: 1, 3, 5, 9, 15, 45, 101, 303, 505, 909

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1000111000001

Octal: 10701

Duodecimal: 2769

Hexadecimal: 11c1

Square: 20657025

Square Root: 67.4166151627327

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

Doublets: base-10 representation is the juxtaposition of two identical strings. A20338

Number T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X 9 rectangle under all symmetry operations of the rectangle; irregular triangle T(n,k), n>=2, 0<=k<=4·floor(n/2), read by rows. A238581

Numbers which have only digits 4 and 5 in base 10. A256290

Numbers k for which nontrivial positive magic squares of exactly 7 different orders with magic sum k exist. For a definition of nontrivial positive magic squares, see A125005. A125014

Numbers k such that k | 14^k + 1. A15965

Numbers m such that the largest digit in the decimal expansion of 1/m is 2. A341383

a(n+1) = a(n) + n (if n is even), a(n+1) = a(n) * n (if n is odd). A47905

Positions in A218787 and A218788 of successive distinct values. A218611

Number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 633", based on the 5-celled von Neumann neighborhood. A273299

Numbers k such that 2k+1, 4k+1 and 6k+1 are primes. A124408