1042331243509 has 2 divisors, whose sum is σ = 1042331243510. Its totient is φ = 1042331243508.

The previous prime is 1042331243507. The next prime is 1042331243549. The reversal of 1042331243509 is 9053421332401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014401480625 + 27929762884 = 1007175^2 + 167122^2 .

It is an emirp because it is prime and its reverse (9053421332401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042331243509 - 2¹ = 1042331243507 is a prime.

Together with 1042331243507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042331243501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521165621754 + 521165621755.

It is an arithmetic number, because the mean of its divisors is an integer number (521165621755).

Almost surely, 2^{1042331243509} is an apocalyptic number.

It is an amenable number.

1042331243509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042331243509 is an equidigital number, since it uses as much as digits as its factorization.

1042331243509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 1042331243509 in words is "one trillion, forty-two billion, three hundred thirty-one million, two hundred forty-three thousand, five hundred nine".