1091121942 has 16 divisors (see below), whose sum is σ = 2252639232. Its totient is φ = 351974760.

The previous prime is 1091121919. The next prime is 1091121953. The reversal of 1091121942 is 2491211901.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2932938 + ... + 2933309.

It is an arithmetic number, because the mean of its divisors is an integer number (140789952).

Almost surely, 2^1091121942 is an apocalyptic number.

1091121942 is an abundant number, since it is smaller than the sum of its proper divisors (1161517290).

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

1091121942 is a wasteful number, since it uses less digits than its factorization.

1091121942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866283.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1091121942 is about 33032.1349900366. The cubic root of 1091121942 is about 1029.4954458454.

The spelling of 1091121942 in words is "one billion, ninety-one million, one hundred twenty-one thousand, nine hundred forty-two".