521541 has 12 divisors (see below), whose sum is σ = 760032. Its totient is φ = 344616.

The previous prime is 521539. The next prime is 521551. The reversal of 521541 is 145125.

It is not a de Polignac number, because 521541 - 2¹ = 521539 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1330 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (63336).

2⁵²¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

521541 is a deficient number, since it is larger than the sum of its proper divisors (238491).

521541 is a wasteful number, since it uses less digits than its factorization.

521541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 517 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 521541 is about 722.1779559084. The cubic root of 521541 is about 80.4938719407.

Adding to 521541 its reverse (145125), we get a palindrome (666666).

The spelling of 521541 in words is "five hundred twenty-one thousand, five hundred forty-one".