1005041805 has 16 divisors (see below), whose sum is σ = 1620731904. Its totient is φ = 531800640.

The previous prime is 1005041801. The next prime is 1005041831. The reversal of 1005041805 is 5081405001.

It is not a de Polignac number, because 1005041805 - 2² = 1005041801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005041801) 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 in 15 ways as a sum of consecutive naturals, for example, 261886 + ... + 265695.

It is an arithmetic number, because the mean of its divisors is an integer number (101295744).

Almost surely, 2^1005041805 is an apocalyptic number.

1005041805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005041805 is a deficient number, since it is larger than the sum of its proper divisors (615690099).

1005041805 is a wasteful number, since it uses less digits than its factorization.

1005041805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527716.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1005041805 is about 31702.3943102094. The cubic root of 1005041805 is about 1001.6777851294.

Adding to 1005041805 its reverse (5081405001), we get a palindrome (6086446806).

The spelling of 1005041805 in words is "one billion, five million, forty-one thousand, eight hundred five".