521002 has 8 divisors (see below), whose sum is σ = 784836. Its totient is φ = 259392.

The previous prime is 520981. The next prime is 521009. The reversal of 521002 is 200125.

521002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 447561 + 73441 = 669^2 + 271^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 521002.

It is not an unprimeable number, because it can be changed into a prime (521009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288 + ... + 1060.

2⁵²¹⁰⁰² is an apocalyptic number.

521002 is a deficient number, since it is larger than the sum of its proper divisors (263834).

521002 is a wasteful number, since it uses less digits than its factorization.

521002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 521002 is about 721.8046827224. The cubic root of 521002 is about 80.4661328932.

Adding to 521002 its reverse (200125), we get a palindrome (721127).

The spelling of 521002 in words is "five hundred twenty-one thousand, two".