Properties of the Number 12648

Twelve Thousand Six Hundred Forty-Eight

Basics

Value: 12647 → 12648 → 12649

Parity: even

Prime: No

Previous Prime: 12647

Next Prime: 12653

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 17 × 31

Divisors: 1, 2, 3, 4, 6, 8, 12, 17, 24, 31

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000101101000

Octal: 30550

Duodecimal: 73A0

Hexadecimal: 3168

Square: 159971904

Square Root: 112.46332735607639

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

3 times 11-gonal (or hendecagonal) numbers: a(n) = 3·n*(9·n-7)/2. A153783

Numbers k such that σ(k) = 9*φ(k). A163667

Number of monosubstituted alkanes C(n-1)H(2n-1)-X with n-1 carbon atoms that are stereoisomers. A620

Numbers divisible by at least four of their digits, different and >1. A187238

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x+127)² = y². A129992

a(n) = ∑_k=0..n p(k)², where p(k) is the partition function A000041. A259399

a(n) = ((7·n+10)(!⁷))/10(1⁷), related to A034830 (((7·n+3)(!⁷))/3 sept-, or 7-factorials). A53106

Integers n such that σ(n)/φ(n) is a perfect square. A293391

Number of subsets of {1..n} containing n such that no element is a sum of distinct other elements. A variation of non-binary sum-free subsets without re-usable elements. A365071

Number of partitions of 1/n into 4 reciprocals of positive integers. A20327