1222727556 has 48 divisors (see below), whose sum is σ = 2915897600. Its totient is φ = 398691072.

The previous prime is 1222727549. The next prime is 1222727563. The reversal of 1222727556 is 6557272221.

It is an interprime number because it is at equal distance from previous prime (1222727549) and next prime (1222727563).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97416 + ... + 109248.

Almost surely, 2^1222727556 is an apocalyptic number.

It is an amenable number.

1222727556 is an abundant number, since it is smaller than the sum of its proper divisors (1693170044).

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

1222727556 is a wasteful number, since it uses less digits than its factorization.

1222727556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028 (or 12026 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 1222727556 is about 34967.5214449066. The cubic root of 1222727556 is about 1069.3254420082.

Adding to 1222727556 its reverse (6557272221), we get a palindrome (7779999777).

The spelling of 1222727556 in words is "one billion, two hundred twenty-two million, seven hundred twenty-seven thousand, five hundred fifty-six".