1222266 has 32 divisors (see below), whose sum is σ = 2706048. Its totient is φ = 366080.

The previous prime is 1222259. The next prime is 1222267. The reversal of 1222266 is 6622221.

1222266 is a nontrivial binomial coefficient, being equal to C(1564, 2).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2086 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (84564).

2^1222266 is an apocalyptic number.

1222266 is the 1563-rd triangular number and also the 782-nd hexagonal number.

1222266 is an abundant number, since it is smaller than the sum of its proper divisors (1483782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222266 is a wasteful number, since it uses less digits than its factorization.

1222266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its digits is 576, while the sum is 21.

The square root of 1222266 is about 1105.5613958528. The cubic root of 1222266 is about 106.9190875185.

Adding to 1222266 its reverse (6622221), we get a palindrome (7844487).

The spelling of 1222266 in words is "one million, two hundred twenty-two thousand, two hundred sixty-six".