1222445306 has 4 divisors (see below), whose sum is σ = 1833667962. Its totient is φ = 611222652.

The previous prime is 1222445201. The next prime is 1222445311. The reversal of 1222445306 is 6035442221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6035442221 = 17 ⋅355026013.

It can be written as a sum of positive squares in only one way, i.e., 621754225 + 600691081 = 24935^2 + 24509^2 .

It is a super-2 number, since 2×1222445306² = 2988745052322867272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305611325 + ... + 305611328.

Almost surely, 2^1222445306 is an apocalyptic number.

1222445306 is a deficient number, since it is larger than the sum of its proper divisors (611222656).

1222445306 is an equidigital number, since it uses as much as digits as its factorization.

1222445306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611222655.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1222445306 is about 34963.4853239776. The cubic root of 1222445306 is about 1069.2431559391.

Adding to 1222445306 its reverse (6035442221), we get a palindrome (7257887527).

The spelling of 1222445306 in words is "one billion, two hundred twenty-two million, four hundred forty-five thousand, three hundred six".