Properties of the Number 1222

One Thousand Two Hundred Twenty-Two

Basics

Value: 1221 → 1222 → 1223

Parity: even

Prime: No

Previous Prime: 1217

Next Prime: 1223

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 × 13 × 47

Divisors: 1, 2, 13, 26, 47, 94, 611, 1222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011000110

Octal: 2306

Duodecimal: 85A

Hexadecimal: 4c6

Square: 1493284

Square Root: 34.95711658589707

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

Hexagonal pyramidal numbers, or greengrocer's numbers. A2412

Expansion of 1/((1-x)⁴*(1+x)). A2623

Numbers that contain only 1's and 2's. Nonempty binary strings of length n in lexicographic order. A7931

Number of fountains of n coins. A5169

a(n) = n*(n+5)/2. A55998

List of Lyndon words on {1,2} sorted first by length and then lexicographically. A102659

Number of unlabeled rooted phylogenetic trees with n (leaf-) nodes such that for each inner node all children are either leaves or roots of distinct subtrees. A300660

a(n) = n² - 3. A28872

Inverse Moebius transform of triangular numbers. A7437

Goodstein sequence starting with 4: to calculate a(n+1), write a(n) in the hereditary representation in base n+2, then bump the base to n+3, then subtract 1. A56193