1005420161 has 2 divisors, whose sum is σ = 1005420162. Its totient is φ = 1005420160.

The previous prime is 1005420083. The next prime is 1005420173. The reversal of 1005420161 is 1610245001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1001089600 + 4330561 = 31640^2 + 2081^2 .

It is an emirp because it is prime and its reverse (1610245001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005420161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1005420191) 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, 502710080 + 502710081.

It is an arithmetic number, because the mean of its divisors is an integer number (502710081).

Almost surely, 2^1005420161 is an apocalyptic number.

It is an amenable number.

1005420161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005420161 is an equidigital number, since it uses as much as digits as its factorization.

1005420161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1005420161 is about 31708.3610582446. The cubic root of 1005420161 is about 1001.8034658889.

Adding to 1005420161 its reverse (1610245001), we get a palindrome (2615665162).

The spelling of 1005420161 in words is "one billion, five million, four hundred twenty thousand, one hundred sixty-one".