1005220605 has 16 divisors (see below), whose sum is σ = 1617243264. Its totient is φ = 533154240.

The previous prime is 1005220597. The next prime is 1005220609. The reversal of 1005220605 is 5060225001.

It is not a de Polignac number, because 1005220605 - 2³ = 1005220597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005220609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182409 + ... + 187838.

It is an arithmetic number, because the mean of its divisors is an integer number (101077704).

Almost surely, 2^1005220605 is an apocalyptic number.

1005220605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005220605 is a deficient number, since it is larger than the sum of its proper divisors (612022659).

1005220605 is a wasteful number, since it uses less digits than its factorization.

1005220605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370436.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1005220605 is about 31705.2141610808. The cubic root of 1005220605 is about 1001.7371821175.

Adding to 1005220605 its reverse (5060225001), we get a palindrome (6065445606).

The spelling of 1005220605 in words is "one billion, five million, two hundred twenty thousand, six hundred five".