1188985 has 24 divisors (see below), whose sum is σ = 1740096. Its totient is φ = 776160.

The previous prime is 1188977. The next prime is 1188991. The reversal of 1188985 is 5898811.

It is not a de Polignac number, because 1188985 - 2³ = 1188977 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5530 + ... + 5740.

It is an arithmetic number, because the mean of its divisors is an integer number (72504).

2^1188985 is an apocalyptic number.

It is an amenable number.

1188985 is a deficient number, since it is larger than the sum of its proper divisors (551111).

1188985 is a wasteful number, since it uses less digits than its factorization.

1188985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 246 counting only the distinct ones).

The product of its digits is 23040, while the sum is 40.

The square root of 1188985 is about 1090.4058877317. The cubic root of 1188985 is about 105.9397129595.

The spelling of 1188985 in words is "one million, one hundred eighty-eight thousand, nine hundred eighty-five".