1189998 has 16 divisors (see below), whose sum is σ = 2644560. Its totient is φ = 396648.

The previous prime is 1189967. The next prime is 1189999. The reversal of 1189998 is 8999811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10965 + ... + 11072.

It is an arithmetic number, because the mean of its divisors is an integer number (165285).

2^1189998 is an apocalyptic number.

1189998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1189998 is an abundant number, since it is smaller than the sum of its proper divisors (1454562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1189998 is a wasteful number, since it uses less digits than its factorization.

1189998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22048 (or 22042 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 1189998 is about 1090.8702947647. The cubic root of 1189998 is about 105.9697908456.

It can be divided in two parts, 1189 and 998, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1189998 in words is "one million, one hundred eighty-nine thousand, nine hundred ninety-eight".