521206 has 16 divisors (see below), whose sum is σ = 910080. Its totient is φ = 219240.

The previous prime is 521201. The next prime is 521231. The reversal of 521206 is 602125.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 521206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (56880).

2⁵²¹²⁰⁶ is an apocalyptic number.

521206 is a deficient number, since it is larger than the sum of its proper divisors (388874).

521206 is a wasteful number, since it uses less digits than its factorization.

521206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 521206 is about 721.9459813587. The cubic root of 521206 is about 80.4766337800.

It can be divided in two parts, 521 and 206, that added together give a palindrome (727).

The spelling of 521206 in words is "five hundred twenty-one thousand, two hundred six".