1158109 has 4 divisors (see below), whose sum is σ = 1160604. Its totient is φ = 1155616.

The previous prime is 1158089. The next prime is 1158121. The reversal of 1158109 is 9018511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 308025 + 850084 = 555^2 + 922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1158109 - 2⁵ = 1158077 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (290151).

2^1158109 is an apocalyptic number.

It is an amenable number.

1158109 is a deficient number, since it is larger than the sum of its proper divisors (2495).

1158109 is an equidigital number, since it uses as much as digits as its factorization.

1158109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494.

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

The square root of 1158109 is about 1076.1547286520. The cubic root of 1158109 is about 105.0146313700.

The spelling of 1158109 in words is "one million, one hundred fifty-eight thousand, one hundred nine".