1005222005 has 4 divisors (see below), whose sum is σ = 1206266412. Its totient is φ = 804177600.

The previous prime is 1005221977. The next prime is 1005222013. The reversal of 1005222005 is 5002225001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5002225001 = 499 ⋅10024499.

It can be written as a sum of positive squares in 2 ways, for example, as 625050001 + 380172004 = 25001^2 + 19498^2 .

It is not a de Polignac number, because 1005222005 - 2⁶ = 1005221941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 100522196 + ... + 100522205.

It is an arithmetic number, because the mean of its divisors is an integer number (301566603).

Almost surely, 2^1005222005 is an apocalyptic number.

It is an amenable number.

1005222005 is a deficient number, since it is larger than the sum of its proper divisors (201044407).

1005222005 is an equidigital number, since it uses as much as digits as its factorization.

1005222005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201044406.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1005222005 is about 31705.2362394605. The cubic root of 1005222005 is about 1001.7376471668.

Adding to 1005222005 its reverse (5002225001), we get a palindrome (6007447006).

The spelling of 1005222005 in words is "one billion, five million, two hundred twenty-two thousand, five".