1189992 has 32 divisors (see below), whose sum is σ = 3002400. Its totient is φ = 393024.

The previous prime is 1189967. The next prime is 1189999. The reversal of 1189992 is 2999811.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1189992.

It is not an unprimeable number, because it can be changed into a prime (1189999) 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 7 ways as a sum of consecutive naturals, for example, 4158 + ... + 4434.

It is an arithmetic number, because the mean of its divisors is an integer number (93825).

2^1189992 is an apocalyptic number.

1189992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1189992 is an abundant number, since it is smaller than the sum of its proper divisors (1812408).

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

1189992 is a wasteful number, since it uses less digits than its factorization.

1189992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 461 counting only the distinct ones).

The product of its digits is 11664, while the sum is 39.

The square root of 1189992 is about 1090.8675446634. The cubic root of 1189992 is about 105.9696127445.

The spelling of 1189992 in words is "one million, one hundred eighty-nine thousand, nine hundred ninety-two".