1121534988 has 48 divisors (see below), whose sum is σ = 3087243264. Its totient is φ = 310101120.

The previous prime is 1121534971. The next prime is 1121535031. The reversal of 1121534988 is 8894351211.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 212745 + ... + 217952.

It is an arithmetic number, because the mean of its divisors is an integer number (64317568).

Almost surely, 2^1121534988 is an apocalyptic number.

It is an amenable number.

1121534988 is an abundant number, since it is smaller than the sum of its proper divisors (1965708276).

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

1121534988 is a wasteful number, since it uses less digits than its factorization.

1121534988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430742 (or 430740 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 1121534988 is about 33489.3264787454. The cubic root of 1121534988 is about 1038.9730333278.

The spelling of 1121534988 in words is "one billion, one hundred twenty-one million, five hundred thirty-four thousand, nine hundred eighty-eight".