404068521 has 16 divisors (see below), whose sum is σ = 548637120. Its totient is φ = 264452160.

The previous prime is 404068519. The next prime is 404068523. The reversal of 404068521 is 125860404.

It is an interprime number because it is at equal distance from previous prime (404068519) and next prime (404068523).

It is not a de Polignac number, because 404068521 - 2¹ = 404068519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404068523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208071 + ... + 210003.

It is an arithmetic number, because the mean of its divisors is an integer number (34289820).

Almost surely, 2^404068521 is an apocalyptic number.

It is an amenable number.

404068521 is a deficient number, since it is larger than the sum of its proper divisors (144568599).

404068521 is a wasteful number, since it uses less digits than its factorization.

404068521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 404068521 is about 20101.4556935561. The cubic root of 404068521 is about 739.2959708975.

The spelling of 404068521 in words is "four hundred four million, sixty-eight thousand, five hundred twenty-one".