521241242125404 has 24 divisors (see below), whose sum is σ = 1216913993576848. Its totient is φ = 173649305191680.

The previous prime is 521241242125403. The next prime is 521241242125421. The reversal of 521241242125404 is 404521242142125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521241242125403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12221917387 + ... + 12221960034.

Almost surely, 2^{521241242125404} is an apocalyptic number.

It is an amenable number.

521241242125404 is an abundant number, since it is smaller than the sum of its proper divisors (695672751451444).

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

521241242125404 is a wasteful number, since it uses less digits than its factorization.

521241242125404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24443879205 (or 24443879203 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 39.

Adding to 521241242125404 its reverse (404521242142125), we get a palindrome (925762484267529).

The spelling of 521241242125404 in words is "five hundred twenty-one trillion, two hundred forty-one billion, two hundred forty-two million, one hundred twenty-five thousand, four hundred four".