1158091 has 12 divisors (see below), whose sum is σ = 1350216. Its totient is φ = 989120.

The previous prime is 1158089. The next prime is 1158121. The reversal of 1158091 is 1908511.

It is not a de Polignac number, because 1158091 - 2¹ = 1158089 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1158011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1776 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (112518).

2^1158091 is an apocalyptic number.

1158091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1158091 is a deficient number, since it is larger than the sum of its proper divisors (192125).

1158091 is a wasteful number, since it uses less digits than its factorization.

1158091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 1158091 is about 1076.1463655098. The cubic root of 1158091 is about 105.0140873011.

The spelling of 1158091 in words is "one million, one hundred fifty-eight thousand, ninety-one".