1091125842 has 16 divisors (see below), whose sum is σ = 2277132480. Its totient is φ = 347895152.

The previous prime is 1091125837. The next prime is 1091125873. The reversal of 1091125842 is 2485211901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3953217 + ... + 3953492.

It is an arithmetic number, because the mean of its divisors is an integer number (142320780).

Almost surely, 2^1091125842 is an apocalyptic number.

1091125842 is an abundant number, since it is smaller than the sum of its proper divisors (1186006638).

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

1091125842 is a wasteful number, since it uses less digits than its factorization.

1091125842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906737.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1091125842 is about 33032.1940234069. The cubic root of 1091125842 is about 1029.4966724200.

The spelling of 1091125842 in words is "one billion, ninety-one million, one hundred twenty-five thousand, eight hundred forty-two".