521353 has 8 divisors (see below), whose sum is σ = 604800. Its totient is φ = 440160.

The previous prime is 521329. The next prime is 521357. The reversal of 521353 is 353125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521353 - 2⁹ = 520841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521353.

It is not an unprimeable number, because it can be changed into a prime (521357) 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 in 7 ways as a sum of consecutive naturals, for example, 28 + ... + 1021.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2⁵²¹³⁵³ is an apocalyptic number.

It is an amenable number.

521353 is a deficient number, since it is larger than the sum of its proper divisors (83447).

521353 is a wasteful number, since it uses less digits than its factorization.

521353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127.

The product of its digits is 450, while the sum is 19.

The square root of 521353 is about 722.0477823524. The cubic root of 521353 is about 80.4841988970.

Adding to 521353 its reverse (353125), we get a palindrome (874478).

The spelling of 521353 in words is "five hundred twenty-one thousand, three hundred fifty-three".