Properties of the Number 12215

Twelve Thousand Two Hundred Fifteen

Basics

Value: 12214 → 12215 → 12216

Parity: odd

Prime: No

Previous Prime: 12211

Next Prime: 12227

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 × 7 × 349

Divisors: 1, 5, 7, 35, 349, 1745, 2443, 12215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111110110111

Octal: 27667

Duodecimal: 709B

Hexadecimal: 2fb7

Square: 149206225

Square Root: 110.52149112276761

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

Numbers such that the digital sum base 2 and the digital sum base 3 and the digital sum base 10 all are equal. A135120

Triangle T(n, k, m) = coefficients of p(x, n, m) where p(x,n,m) = (x+1)*p(x, n-1, m) + (2^m+n-1 + 2^n-2*[n>=3])*x·p(x, n-2, m) and m=2, read by rows. A154984

Gaps of 7 in sequence A038593 (lower terms). A38653

Number of simple class-1 graphs on n nodes. A99435

Expansion of ∑_i>=1 x^i*(i+1/2)/(1 - x^i*(i+1/2)) / ∏_j>=1 (1 - x^j*(j+1/2)). A281615

Numbers ending with '5' that are the difference of two positive cubes. A38860

a(n) = (n+5)³ - n³. A38867

σ(n)-φ(n) and σ(n)+φ(n) are two palindromes greater than 2. A116031

a(0)=1; thereafter a(n) = ∑_k=2..n+1 A006206(k). A286271

Number of partitions of n such that cn(0,5) = cn(2,5) < cn(3,5) = cn(4,5) < cn(1,5). A36858