Properties of the Number 18129

Eighteen Thousand One Hundred Twenty-Nine

Basics

Value: 18128 → 18129 → 18130

Parity: odd

Prime: No

Previous Prime: 18127

Next Prime: 18131

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 6043

Divisors: 1, 3, 6043, 18129

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011011010001

Octal: 43321

Duodecimal: A5A9

Hexadecimal: 46d1

Square: 328660641

Square Root: 134.6439749858864

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 n such that n!10 + 2 is prime. A204657

Number of permutations p of [n] with no fixed points and displacement of elements restricted by four: 1 <= |p(i)-i| <= 4. A259777

Matrix inverse of Euler's triangle A008292. A55325

Semiprimes q such that q²-4 and q²+4 are also semiprimes. A173084

Number of partitions p of n such that 2·min(p) is not a part of p. A238594

Coefficient array for powers of x² of polynomials appearing in a generalized Melham conjecture on alternating sums of fifth powers of Chebyshev S polynomials with odd indices. A220671

Centered octahemioctahedral numbers: a(n) = (4·n³+24·n²+8·n+3)/3. A274974

Triangle read by rows: T(n, k) = ∑_j=0..k (-1)^j*binomial(n, j)*(k + 1 - j)^{n - 1}. A162498

Isolated deficient numbers that are divisible by 3. A273255

Column 1 of triangle A055325. A55326