521359 has 2 divisors, whose sum is σ = 521360. Its totient is φ = 521358.

The previous prime is 521357. The next prime is 521363. The reversal of 521359 is 953125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521359 - 2¹ = 521357 is a prime.

It is a super-3 number, since 3×521359³ = 425139913332813837, which contains 333 as substring.

Together with 521357, it forms a pair of twin primes.

521359 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521357) 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 as a sum of consecutive naturals, namely, 260679 + 260680.

It is an arithmetic number, because the mean of its divisors is an integer number (260680).

2⁵²¹³⁵⁹ is an apocalyptic number.

521359 is a deficient number, since it is larger than the sum of its proper divisors (1).

521359 is an equidigital number, since it uses as much as digits as its factorization.

521359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 25.

The square root of 521359 is about 722.0519371901. The cubic root of 521359 is about 80.4845076471.

The spelling of 521359 in words is "five hundred twenty-one thousand, three hundred fifty-nine".