1121256036 has 72 divisors (see below), whose sum is σ = 2864481984. Its totient is φ = 369794880.

The previous prime is 1121256013. The next prime is 1121256061. The reversal of 1121256036 is 6306521211.

1121256036 is a `hidden beast` number, since 11 + 21 + 25 + 603 + 6 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2530831 + ... + 2531273.

It is an arithmetic number, because the mean of its divisors is an integer number (39784472).

Almost surely, 2^1121256036 is an apocalyptic number.

It is an amenable number.

1121256036 is an abundant number, since it is smaller than the sum of its proper divisors (1743225948).

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

1121256036 is a wasteful number, since it uses less digits than its factorization.

1121256036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1121256036 is about 33485.1614301021. The cubic root of 1121256036 is about 1038.8868872154.

Adding to 1121256036 its reverse (6306521211), we get a palindrome (7427777247).

The spelling of 1121256036 in words is "one billion, one hundred twenty-one million, two hundred fifty-six thousand, thirty-six".