1188945 has 16 divisors (see below), whose sum is σ = 2113920. Its totient is φ = 634032.

The previous prime is 1188937. The next prime is 1188947. The reversal of 1188945 is 5498811.

It is not a de Polignac number, because 1188945 - 2³ = 1188937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1188947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4269 + ... + 4538.

It is an arithmetic number, because the mean of its divisors is an integer number (132120).

2^1188945 is an apocalyptic number.

1188945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1188945 is a deficient number, since it is larger than the sum of its proper divisors (924975).

1188945 is an equidigital number, since it uses as much as digits as its factorization.

1188945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8821 (or 8815 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1188945 is about 1090.3875457836. The cubic root of 1188945 is about 105.9385249333.

The spelling of 1188945 in words is "one million, one hundred eighty-eight thousand, nine hundred forty-five".