1042442189 has 2 divisors, whose sum is σ = 1042442190. Its totient is φ = 1042442188.

The previous prime is 1042442183. The next prime is 1042442221. The reversal of 1042442189 is 9812442401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014932164 + 27510025 = 31858^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042442189 - 2⁴ = 1042442173 is a prime.

It is a super-2 number, since 2×1042442189² = 2173371434814223442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042442183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521221094 + 521221095.

It is an arithmetic number, because the mean of its divisors is an integer number (521221095).

Almost surely, 2^1042442189 is an apocalyptic number.

It is an amenable number.

1042442189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042442189 is an equidigital number, since it uses as much as digits as its factorization.

1042442189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1042442189 is about 32286.8733233802. The cubic root of 1042442189 is about 1013.9518373098.

The spelling of 1042442189 in words is "one billion, forty-two million, four hundred forty-two thousand, one hundred eighty-nine".