1090443 has 4 divisors (see below), whose sum is σ = 1453928. Its totient is φ = 726960.

The previous prime is 1090423. The next prime is 1090457. The reversal of 1090443 is 3440901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3440901 = 3 ⋅1146967.

It is not a de Polignac number, because 1090443 - 2¹² = 1086347 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181738 + ... + 181743.

It is an arithmetic number, because the mean of its divisors is an integer number (363482).

2^1090443 is an apocalyptic number.

1090443 is a deficient number, since it is larger than the sum of its proper divisors (363485).

1090443 is an equidigital number, since it uses as much as digits as its factorization.

1090443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363484.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1090443 is about 1044.2427878611. The cubic root of 1090443 is about 102.9281869741.

The spelling of 1090443 in words is "one million, ninety thousand, four hundred forty-three".