Properties of the Number -1226

Two Hundred Twenty-Six

Basics

Value: -1227 → -1226 → -1225

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 613

Divisors: 1, 2, 613, 1226

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011001010

Octal: -2312

Duodecimal: -862

Hexadecimal: -4ca

Square: 1503076

Square Root: 35.014282800023196

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

Expansion of 1/(1 + ∑_i>=1 q^i²/∏_j=1..i (1 + q^2·j)). A294408

Triangle t(n,m)= binomial(n+m-1,n-1) + binomial(2·n-m-1,n-1) -binomial(2·n-1,n-1) read by rows, 0<=m<=n. A174952

Expansion of ∏_{i>=1, j>=1, k>=1, l>=1} (1 - x^i·j*k·l)/(1 + x^i·j*k·l). A321302

a(n) = n² + 1. A2522

Central polygonal numbers (the Lazy Caterer's sequence): n(n+1)/2 + 1; or, maximal number of pieces formed when slicing a pancake with n cuts. A124

Number of rooted identity trees with n nodes (rooted trees whose automorphism group is the identity group). A4111

a(1) = 1 and a(n) = ceiling((∑_k=1..n-1 a(k))/3) for n >= 2. A72493

Number of partitions of n such that no part is a sum of two other parts. A236912

Number of integer partitions of n without an alternating permutation. A345165

Number of integer partitions of n such that it is not possible to choose a different prime factor of each part. A370593