521004412 has 6 divisors (see below), whose sum is σ = 911757728. Its totient is φ = 260502204.

The previous prime is 521004409. The next prime is 521004433. The reversal of 521004412 is 214400125.

It is a self number, because there is not a number n which added to its sum of digits gives 521004412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65125548 + ... + 65125555.

Almost surely, 2^521004412 is an apocalyptic number.

It is an amenable number.

521004412 is a deficient number, since it is larger than the sum of its proper divisors (390753316).

521004412 is a wasteful number, since it uses less digits than its factorization.

521004412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130251107 (or 130251105 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 521004412 is about 22825.5210674368. The cubic root of 521004412 is about 804.6625706673.

Adding to 521004412 its reverse (214400125), we get a palindrome (735404537).

The spelling of 521004412 in words is "five hundred twenty-one million, four thousand, four hundred twelve".