521018 has 8 divisors (see below), whose sum is σ = 822720. Its totient is φ = 246780.

The previous prime is 521009. The next prime is 521021. The reversal of 521018 is 810125.

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

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 520987 and 521005.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6818 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (102840).

2⁵²¹⁰¹⁸ is an apocalyptic number.

521018 is a deficient number, since it is larger than the sum of its proper divisors (301702).

521018 is a wasteful number, since it uses less digits than its factorization.

521018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13732.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 521018 is about 721.8157659680. The cubic root of 521018 is about 80.4669565912.

The spelling of 521018 in words is "five hundred twenty-one thousand, eighteen".