Properties of the Number 1854

One Thousand Eight Hundred Fifty-Four

Basics

Value: 1853 → 1854 → 1855

Parity: even

Prime: No

Previous Prime: 1847

Next Prime: 1861

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 103

Divisors: 1, 2, 3, 6, 9, 18, 103, 206, 309, 618

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11100111110

Octal: 3476

Duodecimal: 10A6

Hexadecimal: 73e

Square: 3437316

Square Root: 43.05810028322197

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

Subfactorial or rencontres numbers, or derangements: number of permutations of n elements with no fixed points. A166

Triangle T(n,k) of rencontres numbers (number of permutations of n elements with k fixed points). A8290

Coordination sequence for "flu" 3D uniform tiling formed from tetrahedra, rhombicuboctahedra, and cubes. A299272

Generalized 14-gonal numbers: m*(6·m-5), m = 0,+1,-1,+2,-2,+3,-3,... A195818

Triangle read by rows: T(n,k) = number of partial derangements, that is, the number of permutations of n distinct, ordered items in which exactly k of the items are in their natural ordered positions, for n >= 0, k = n, n-1, ..., 1, 0. A98825

Triangle T(n,k) of numbers of distinct shapes under rotation of non-extendable (complete) non-self-adjacent simple paths within a square lattice bounded by rectangles with nodal dimensions n and k, n >= k >= 2. A213249

Triangle read by rows: T(n,k) is the number of permutations of [n] having k consecutive ascending pairs (0 <= k <= n-1). A10027

Multiples of 18 containing a 18 in their decimal representation. A121038

14-gonal (or tetradecagonal) numbers: a(n) = n*(6·n-5). A51866

Triangular array formed from successive differences of factorial numbers. A47920