1131091 has 8 divisors (see below), whose sum is σ = 1227744. Its totient is φ = 1035840.

The previous prime is 1131083. The next prime is 1131103. The reversal of 1131091 is 1901311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131091 - 2³ = 1131083 is a prime.

It is a Duffinian number.

1131091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1131191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1911 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (153468).

2^1131091 is an apocalyptic number.

1131091 is a deficient number, since it is larger than the sum of its proper divisors (96653).

1131091 is a wasteful number, since it uses less digits than its factorization.

1131091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1131091 is about 1063.5276207039. The cubic root of 1131091 is about 104.1915540179.

The spelling of 1131091 in words is "one million, one hundred thirty-one thousand, ninety-one".