520841 has 2 divisors, whose sum is σ = 520842. Its totient is φ = 520840.

The previous prime is 520837. The next prime is 520853. The reversal of 520841 is 148025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364816 + 156025 = 604^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 520841 - 2² = 520837 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (520241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260420 + 260421.

It is an arithmetic number, because the mean of its divisors is an integer number (260421).

2⁵²⁰⁸⁴¹ is an apocalyptic number.

It is an amenable number.

520841 is a deficient number, since it is larger than the sum of its proper divisors (1).

520841 is an equidigital number, since it uses as much as digits as its factorization.

520841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 520841 is about 721.6931480900. The cubic root of 520841 is about 80.4578434931.

Adding to 520841 its reverse (148025), we get a palindrome (668866).

Subtracting from 520841 its reverse (148025), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 520841 in words is "five hundred twenty thousand, eight hundred forty-one".