1222906 has 4 divisors (see below), whose sum is σ = 1834362. Its totient is φ = 611452.

The previous prime is 1222889. The next prime is 1222909. The reversal of 1222906 is 6092221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6092221 = 509 ⋅11969.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 429025 = 891^2 + 655^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1222909) 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 as a sum of consecutive naturals, namely, 305725 + ... + 305728.

2^1222906 is an apocalyptic number.

1222906 is a deficient number, since it is larger than the sum of its proper divisors (611456).

1222906 is an equidigital number, since it uses as much as digits as its factorization.

1222906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611455.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1222906 is about 1105.8508036801. The cubic root of 1222906 is about 106.9377458346.

The spelling of 1222906 in words is "one million, two hundred twenty-two thousand, nine hundred six".