1742435752721 has 2 divisors, whose sum is σ = 1742435752722. Its totient is φ = 1742435752720.

The previous prime is 1742435752693. The next prime is 1742435752741. The reversal of 1742435752721 is 1272575342471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597835043025 + 144600709696 = 1264055^2 + 380264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1742435752721 - 2²⁶ = 1742368643857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1742435752721.

It is not a weakly prime, because it can be changed into another prime (1742435752741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 871217876360 + 871217876361.

It is an arithmetic number, because the mean of its divisors is an integer number (871217876361).

Almost surely, 2^{1742435752721} is an apocalyptic number.

It is an amenable number.

1742435752721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1742435752721 is an equidigital number, since it uses as much as digits as its factorization.

1742435752721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3292800, while the sum is 50.

The spelling of 1742435752721 in words is "one trillion, seven hundred forty-two billion, four hundred thirty-five million, seven hundred fifty-two thousand, seven hundred twenty-one".