1042052043509 has 2 divisors, whose sum is σ = 1042052043510. Its totient is φ = 1042052043508.

The previous prime is 1042052043469. The next prime is 1042052043551. The reversal of 1042052043509 is 9053402502401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873421084900 + 168630958609 = 934570^2 + 410647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042052043509 is a prime.

It is a super-2 number, since 2×1042052043509² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042052043559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521026021754 + 521026021755.

It is an arithmetic number, because the mean of its divisors is an integer number (521026021755).

Almost surely, 2^{1042052043509} is an apocalyptic number.

It is an amenable number.

1042052043509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042052043509 is an equidigital number, since it uses as much as digits as its factorization.

1042052043509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 1042052043509 in words is "one trillion, forty-two billion, fifty-two million, forty-three thousand, five hundred nine".