521075672 has 64 divisors (see below), whose sum is σ = 1105272000. Its totient is φ = 229861632.

The previous prime is 521075663. The next prime is 521075693. The reversal of 521075672 is 276570125.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403604 + ... + 404892.

It is an arithmetic number, because the mean of its divisors is an integer number (17269875).

Almost surely, 2^521075672 is an apocalyptic number.

521075672 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521075672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552636000).

521075672 is an abundant number, since it is smaller than the sum of its proper divisors (584196328).

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

521075672 is a wasteful number, since it uses less digits than its factorization.

521075672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 521075672 is about 22827.0819860971. The cubic root of 521075672 is about 804.6992547077.

The spelling of 521075672 in words is "five hundred twenty-one million, seventy-five thousand, six hundred seventy-two".