1222222 has 4 divisors (see below), whose sum is σ = 1833336. Its totient is φ = 611110.

The previous prime is 1222219. The next prime is 1222229. The reversal of 1222222 is 2222221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2222221 = 19 ⋅116959.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

1222222 is a modest number, since divided by 2222 gives 122 as remainder.

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 (1222229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305554 + ... + 305557.

It is an arithmetic number, because the mean of its divisors is an integer number (458334).

2^1222222 is an apocalyptic number.

1222222 is a deficient number, since it is larger than the sum of its proper divisors (611114).

1222222 is an equidigital number, since it uses as much as digits as its factorization.

1222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611113.

The product of its digits is 64, while the sum is 13.

The square root of 1222222 is about 1105.5414962813. The cubic root of 1222222 is about 106.9178045200.

Adding to 1222222 its reverse (2222221), we get a palindrome (3444443).

Subtracting 1222222 from its reverse (2222221), we obtain a palindrome (999999).

It can be divided in two parts, 1222 and 222, that added together give a square (1444 = 38²).

The spelling of 1222222 in words is "one million, two hundred twenty-two thousand, two hundred twenty-two".