1745068021 has 2 divisors, whose sum is σ = 1745068022. Its totient is φ = 1745068020.

The previous prime is 1745068009. The next prime is 1745068049. The reversal of 1745068021 is 1208605471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1175529796 + 569538225 = 34286^2 + 23865^2 .

It is an emirp because it is prime and its reverse (1208605471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1745068021 - 2¹³ = 1745059829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1745068421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 872534010 + 872534011.

It is an arithmetic number, because the mean of its divisors is an integer number (872534011).

Almost surely, 2^1745068021 is an apocalyptic number.

It is an amenable number.

1745068021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1745068021 is an equidigital number, since it uses as much as digits as its factorization.

1745068021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1745068021 is about 41774.0113108617. The cubic root of 1745068021 is about 1203.9379934900.

The spelling of 1745068021 in words is "one billion, seven hundred forty-five million, sixty-eight thousand, twenty-one".