Properties of the Number 3645

Three Thousand Six Hundred Forty-Five

Basics

Value: 3644 → 3645 → 3646

Parity: odd

Prime: No

Previous Prime: 3643

Next Prime: 3659

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁶ × 5

Divisors: 1, 3, 5, 9, 15, 27, 45, 81, 135, 243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000111101

Octal: 7075

Duodecimal: 2139

Hexadecimal: e3d

Square: 13286025

Square Root: 60.37383539249432

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Triangular array: the fusion of (x+1)ⁿ and (x+2)ⁿ; see Comments for the definition of fusion. A193722

Least number with exactly n odd divisors. A38547

a(n) is the number of subsets of {1,...,n} containing no solutions to x+y=z with·and y distinct (one version of "sum-free subsets"). A85489

Numbers of the form 3ⁱ*5^j with i, j >= 0. A3593

a(n) = 5·n². A33429

Numbers that are the sum of 5 positive 6th powers. A3361

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n*(-1)ⁿ as Sum(k=0..n)T(n,k)*binomial(n,k). A244140

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n as Sum(k=0..n)T(n,k)*binomial(n,k). A244142

Triangle read by rows: terms T(n,k) of a binomial decomposition of n as Sum(k=0..n)T(n,k). A244143

Numbers whose prime factors are 3 and 5. A33849