521041005 has 20 divisors (see below), whose sum is σ = 934014972. Its totient is φ = 277888320.

The previous prime is 521040983. The next prime is 521041033. The reversal of 521041005 is 500140125.

It can be written as a sum of positive squares in 2 ways, for example, as 208918116 + 312122889 = 14454^2 + 17667^2 .

It is not a de Polignac number, because 521041005 - 2¹² = 521036909 is a prime.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 642856 + ... + 643665.

Almost surely, 2^521041005 is an apocalyptic number.

It is an amenable number.

521041005 is a deficient number, since it is larger than the sum of its proper divisors (412973967).

521041005 is a wasteful number, since it uses less digits than its factorization.

521041005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286538 (or 1286529 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 521041005 is about 22826.3226341870. The cubic root of 521041005 is about 804.6814088495.

The spelling of 521041005 in words is "five hundred twenty-one million, forty-one thousand, five".