1091072442 has 16 divisors (see below), whose sum is σ = 2196045792. Its totient is φ = 361374000.

The previous prime is 1091072387. The next prime is 1091072453. The reversal of 1091072442 is 2442701901.

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, 578184 + ... + 580067.

It is an arithmetic number, because the mean of its divisors is an integer number (137252862).

Almost surely, 2^1091072442 is an apocalyptic number.

1091072442 is an abundant number, since it is smaller than the sum of its proper divisors (1104973350).

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

1091072442 is a wasteful number, since it uses less digits than its factorization.

1091072442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158413.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1091072442 is about 33031.3857111687. The cubic root of 1091072442 is about 1029.4798775289.

The spelling of 1091072442 in words is "one billion, ninety-one million, seventy-two thousand, four hundred forty-two".