1005521604 has 12 divisors (see below), whose sum is σ = 2346217104. Its totient is φ = 335173864.

The previous prime is 1005521603. The next prime is 1005521617. The reversal of 1005521604 is 4061255001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1005521604² = 2022147392221465632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1005521603) 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 in 3 ways as a sum of consecutive naturals, for example, 41896722 + ... + 41896745.

It is an arithmetic number, because the mean of its divisors is an integer number (195518092).

Almost surely, 2^1005521604 is an apocalyptic number.

It is an amenable number.

1005521604 is an abundant number, since it is smaller than the sum of its proper divisors (1340695500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005521604 is a wasteful number, since it uses less digits than its factorization.

1005521604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83793474 (or 83793472 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1005521604 is about 31709.9606433058. The cubic root of 1005521604 is about 1001.8371574523.

Adding to 1005521604 its reverse (4061255001), we get a palindrome (5066776605).

The spelling of 1005521604 in words is "one billion, five million, five hundred twenty-one thousand, six hundred four".