1185109 has 2 divisors, whose sum is σ = 1185110. Its totient is φ = 1185108.

The previous prime is 1185103. The next prime is 1185113. The reversal of 1185109 is 9015811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 140625 = 1022^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1185109 - 2⁵ = 1185077 is a prime.

It is equal to p₉₁₈₇₀ and since 1185109 and 91870 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1185103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592554 + 592555.

It is an arithmetic number, because the mean of its divisors is an integer number (592555).

2^1185109 is an apocalyptic number.

It is an amenable number.

1185109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185109 is an equidigital number, since it uses as much as digits as its factorization.

1185109 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1185109 is about 1088.6271170608. The cubic root of 1185109 is about 105.8244691910.

The spelling of 1185109 in words is "one million, one hundred eighty-five thousand, one hundred nine".