1020206641 has 2 divisors, whose sum is σ = 1020206642. Its totient is φ = 1020206640.

The previous prime is 1020206623. The next prime is 1020206717. The reversal of 1020206641 is 1466020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742017600 + 278189041 = 27240^2 + 16679^2 .

It is an emirp because it is prime and its reverse (1466020201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020206641 - 2¹⁵ = 1020173873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020206041) 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, 510103320 + 510103321.

It is an arithmetic number, because the mean of its divisors is an integer number (510103321).

Almost surely, 2^1020206641 is an apocalyptic number.

It is an amenable number.

1020206641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020206641 is an equidigital number, since it uses as much as digits as its factorization.

1020206641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1020206641 is about 31940.6737718540. The cubic root of 1020206641 is about 1006.6906819386.

Adding to 1020206641 its reverse (1466020201), we get a palindrome (2486226842).

The spelling of 1020206641 in words is "one billion, twenty million, two hundred six thousand, six hundred forty-one".