1040205443 has 4 divisors (see below), whose sum is σ = 1041006288. Its totient is φ = 1039404600.

The previous prime is 1040205427. The next prime is 1040205473. The reversal of 1040205443 is 3445020401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3445020401 = 9227 ⋅373363.

It is a cyclic number.

It is not a de Polignac number, because 1040205443 - 2⁴ = 1040205427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040205473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398471 + ... + 401072.

It is an arithmetic number, because the mean of its divisors is an integer number (260251572).

Almost surely, 2^1040205443 is an apocalyptic number.

1040205443 is a deficient number, since it is larger than the sum of its proper divisors (800845).

1040205443 is an equidigital number, since it uses as much as digits as its factorization.

1040205443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800844.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1040205443 is about 32252.2160944019. The cubic root of 1040205443 is about 1013.2261130519.

Adding to 1040205443 its reverse (3445020401), we get a palindrome (4485225844).

The spelling of 1040205443 in words is "one billion, forty million, two hundred five thousand, four hundred forty-three".