Properties of the Number 1851

One Thousand Eight Hundred Fifty-One

Basics

Value: 1850 → 1851 → 1852

Parity: odd

Prime: No

Previous Prime: 1847

Next Prime: 1861

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 617

Divisors: 1, 3, 617, 1851

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11100111011

Octal: 3473

Duodecimal: 10A3

Hexadecimal: 73b

Square: 3426201

Square Root: 43.02324952859791

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

Sum of the first n primes. A7504

Number of partitions of n into an odd number of parts. A27193

a(n) = n² + 2. A59100

One half of number of non-self-conjugate partitions; also half of number of asymmetric Ferrers graphs with n nodes. A701

Number of partitions of 2n of type EO (see Comments). A236559

Second spoke of a hexagonal spiral. A56106

Coordination sequence for (2,5,6) tiling of hyperbolic plane. A265065

Triangle read by rows: T(n,k) is the number of k-block partitions of an n-set up to rotations and reflections. A152176

a(0) = 1, a(n) = n² + 2 for n > 0. A10000

a(n) = first unlucky number removed at the n-th stage of Lucky sieve. A219178