1139091 has 8 divisors (see below), whose sum is σ = 1571280. Its totient is φ = 733152.

The previous prime is 1139087. The next prime is 1139123. The reversal of 1139091 is 1909311.

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

It is not a de Polignac number, because 1139091 - 2² = 1139087 is a prime.

1139091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1139011) 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, 6460 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (196410).

2^1139091 is an apocalyptic number.

1139091 is a deficient number, since it is larger than the sum of its proper divisors (432189).

1139091 is a wasteful number, since it uses less digits than its factorization.

1139091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13125.

The product of its (nonzero) digits is 243, while the sum is 24.

The square root of 1139091 is about 1067.2820620623. The cubic root of 1139091 is about 104.4366197632.

The spelling of 1139091 in words is "one million, one hundred thirty-nine thousand, ninety-one".