521201 has 2 divisors, whose sum is σ = 521202. Its totient is φ = 521200.

The previous prime is 521179. The next prime is 521231. The reversal of 521201 is 102125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361201 + 160000 = 601^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 521201 - 2⁶ = 521137 is a prime.

It is not a weakly prime, because it can be changed into another prime (521231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260600 + 260601.

It is an arithmetic number, because the mean of its divisors is an integer number (260601).

2⁵²¹²⁰¹ is an apocalyptic number.

It is an amenable number.

521201 is a deficient number, since it is larger than the sum of its proper divisors (1).

521201 is an equidigital number, since it uses as much as digits as its factorization.

521201 is an evil number, because the sum of its binary digits is even.

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

The square root of 521201 is about 721.9425184874. The cubic root of 521201 is about 80.4763764381.

Adding to 521201 its reverse (102125), we get a palindrome (623326).

The spelling of 521201 in words is "five hundred twenty-one thousand, two hundred one".