521061 has 4 divisors (see below), whose sum is σ = 694752. Its totient is φ = 347372.

The previous prime is 521051. The next prime is 521063. The reversal of 521061 is 160125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521061 - 2⁹ = 520549 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 521061.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521061.

It is not an unprimeable number, because it can be changed into a prime (521063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86841 + ... + 86846.

It is an arithmetic number, because the mean of its divisors is an integer number (173688).

2⁵²¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

521061 is a deficient number, since it is larger than the sum of its proper divisors (173691).

521061 is a wasteful number, since it uses less digits than its factorization.

521061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173690.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 521061 is about 721.8455513474. The cubic root of 521061 is about 80.4691701961.

Adding to 521061 its reverse (160125), we get a palindrome (681186).

The spelling of 521061 in words is "five hundred twenty-one thousand, sixty-one".