521016 has 32 divisors (see below), whose sum is σ = 1380240. Its totient is φ = 163328.

The previous prime is 521009. The next prime is 521021. The reversal of 521016 is 610125.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 520986 and 521004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231 + ... + 1046.

2⁵²¹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

521016 is an abundant number, since it is smaller than the sum of its proper divisors (859224).

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

521016 is a wasteful number, since it uses less digits than its factorization.

521016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 521016 is about 721.8143805716. The cubic root of 521016 is about 80.4668536299.

The spelling of 521016 in words is "five hundred twenty-one thousand, sixteen".