521045245 has 8 divisors (see below), whose sum is σ = 714576384. Its totient is φ = 357288144.

The previous prime is 521045237. The next prime is 521045251. The reversal of 521045245 is 542540125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521045245 - 2³ = 521045237 is a prime.

It is a super-2 number, since 2×521045245² = 542976294674220050, which contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 7443469 + ... + 7443538.

It is an arithmetic number, because the mean of its divisors is an integer number (89322048).

Almost surely, 2^521045245 is an apocalyptic number.

It is an amenable number.

521045245 is a deficient number, since it is larger than the sum of its proper divisors (193531139).

521045245 is a wasteful number, since it uses less digits than its factorization.

521045245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14887019.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 521045245 is about 22826.4155092297. The cubic root of 521045245 is about 804.6835915567.

The spelling of 521045245 in words is "five hundred twenty-one million, forty-five thousand, two hundred forty-five".