1121232256 has 64 divisors (see below), whose sum is σ = 2362258800. Its totient is φ = 528629760.

The previous prime is 1121232253. The next prime is 1121232257. The reversal of 1121232256 is 6522321211.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1121232256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121232251) 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 7 ways as a sum of consecutive naturals, for example, 585156 + ... + 587068.

Almost surely, 2^1121232256 is an apocalyptic number.

1121232256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121232256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181129400).

1121232256 is an abundant number, since it is smaller than the sum of its proper divisors (1241026544).

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

1121232256 is a wasteful number, since it uses less digits than its factorization.

1121232256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2175 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1121232256 is about 33484.8063455651. The cubic root of 1121232256 is about 1038.8795428016.

Adding to 1121232256 its reverse (6522321211), we get a palindrome (7643553467).

The spelling of 1121232256 in words is "one billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred fifty-six".