1042000391 has 2 divisors, whose sum is σ = 1042000392. Its totient is φ = 1042000390.

The previous prime is 1042000367. The next prime is 1042000403. The reversal of 1042000391 is 1930002401.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1042000391 - 2²⁶ = 974891527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042000301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521000195 + 521000196.

It is an arithmetic number, because the mean of its divisors is an integer number (521000196).

Almost surely, 2^1042000391 is an apocalyptic number.

1042000391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042000391 is an equidigital number, since it uses as much as digits as its factorization.

1042000391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1042000391 is about 32280.0308395144. The cubic root of 1042000391 is about 1013.8085759066.

Adding to 1042000391 its reverse (1930002401), we get a palindrome (2972002792).

The spelling of 1042000391 in words is "one billion, forty-two million, three hundred ninety-one", and thus it is an aban number.