1121089158 has 144 divisors (see below), whose sum is σ = 2924413440. Its totient is φ = 303937920.

The previous prime is 1121089141. The next prime is 1121089169. The reversal of 1121089158 is 8519801211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14190963 + ... + 14191041.

Almost surely, 2^1121089158 is an apocalyptic number.

1121089158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121089158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462206720).

1121089158 is an abundant number, since it is smaller than the sum of its proper divisors (1803324282).

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

1121089158 is a wasteful number, since it uses less digits than its factorization.

1121089158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The square root of 1121089158 is about 33482.6695172294. The cubic root of 1121089158 is about 1038.8353450276.

The spelling of 1121089158 in words is "one billion, one hundred twenty-one million, eighty-nine thousand, one hundred fifty-eight".