Properties of the Number 12005

Twelve Thousand Five

Basics

Value: 12004 → 12005 → 12006

Parity: odd

Prime: No

Previous Prime: 11987

Next Prime: 12007

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 5 × 7 ⁴

Divisors: 1, 5, 7, 35, 49, 245, 343, 1715, 2401, 12005

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111011100101

Octal: 27345

Duodecimal: 6B45

Hexadecimal: 2ee5

Square: 144120025

Square Root: 109.5673308974897

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

a(n) = 5·n². A33429

a(n) = A276086(A276086(n)), where A276086 is the primorial base exp-function. A276087

Numbers of the form 5ⁱ*7^j with i, j >= 0. A3595

Number of 4's in the last section of the set of partitions of n. A182714

a(n) = 7·a(n-1) - 14·a(n-2) + 7·a(n-3) with a(1)=7, a(2)=21, a(3)=70. A215494

Numbers whose prime factors are 5 and 7. A33851

Triangle whose (i,j)-th entry is binomial(i,j)*7^i-j. A27466

T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 neighboring 1s. A297431

Least positive integer m with prime(m)+2 and prime(prime(m))+2 both prime such that prime(m·n)+2 and prime(prime(m·n))+2 are both prime. A259487

Second column of A027466. A27473