521012 has 6 divisors (see below), whose sum is σ = 911778. Its totient is φ = 260504.

The previous prime is 521009. The next prime is 521021. The reversal of 521012 is 210125.

It can be written as a sum of positive squares in only one way, i.e., 414736 + 106276 = 644^2 + 326^2 .

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 = 520984 and 521002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65123 + ... + 65130.

It is an arithmetic number, because the mean of its divisors is an integer number (151963).

2⁵²¹⁰¹² is an apocalyptic number.

It is an amenable number.

521012 is a deficient number, since it is larger than the sum of its proper divisors (390766).

521012 is a wasteful number, since it uses less digits than its factorization.

521012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130257 (or 130255 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 521012 is about 721.8116097709. The cubic root of 521012 is about 80.4666477064.

Adding to 521012 its reverse (210125), we get a palindrome (731137).

The spelling of 521012 in words is "five hundred twenty-one thousand, twelve".