1020043142309 has 2 divisors, whose sum is σ = 1020043142310. Its totient is φ = 1020043142308.

The previous prime is 1020043142299. The next prime is 1020043142333. The reversal of 1020043142309 is 9032413400201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 569504169025 + 450538973284 = 754655^2 + 671222^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020043142309 - 2³⁶ = 951323665573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020043141309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510021571154 + 510021571155.

It is an arithmetic number, because the mean of its divisors is an integer number (510021571155).

Almost surely, 2^{1020043142309} is an apocalyptic number.

It is an amenable number.

1020043142309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020043142309 is an equidigital number, since it uses as much as digits as its factorization.

1020043142309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 1020043142309 in words is "one trillion, twenty billion, forty-three million, one hundred forty-two thousand, three hundred nine".