Properties of the Number 12195

Twelve Thousand One Hundred Ninety-Five

Basics

Value: 12194 → 12195 → 12196

Parity: odd

Prime: No

Previous Prime: 12163

Next Prime: 12197

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 271

Divisors: 1, 3, 5, 9, 15, 45, 271, 813, 1355, 2439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111110100011

Octal: 27643

Duodecimal: 7083

Hexadecimal: 2fa3

Square: 148718025

Square Root: 110.43097391583576

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

Second pentagonal numbers with even index: a(n) = n*(6·n+1). A49453

Primitive numbers in A229305. A229309

Primitive numbers in A229306. A229310

Number of integer partitions of n with more parts than distinct divisors of parts. A371171

Coefficients in the expansion of C⁶ / B⁷, in Watson's notation of page 106. A160460

Thickened cube numbers: a(n) = n*(n² + (n-1)²) + (n-1)*2·n*(n-1). A50492

a(n) = n*(n+1)*(n⁴ + 2·n³ - 2·n² - 3·n + 3)/2. A152725

a(n) = ceiling((n³)/2). A36486

Numbers k such that 2·k+1, 4·k+1, 8·k+1 and 16·k+1 are primes. A124412