1189990 has 16 divisors (see below), whose sum is σ = 2161152. Its totient is φ = 471744.

The previous prime is 1189967. The next prime is 1189999. The reversal of 1189990 is 999811.

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, 802 + ... + 1738.

It is an arithmetic number, because the mean of its divisors is an integer number (135072).

2^1189990 is an apocalyptic number.

1189990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1189990 is a deficient number, since it is larger than the sum of its proper divisors (971162).

1189990 is a wasteful number, since it uses less digits than its factorization.

1189990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1189990 is about 1090.8666279615. The cubic root of 1189990 is about 105.9695533773.

The spelling of 1189990 in words is "one million, one hundred eighty-nine thousand, nine hundred ninety".