521344 has 16 divisors (see below), whose sum is σ = 1038870. Its totient is φ = 260608.

The previous prime is 521329. The next prime is 521357. The reversal of 521344 is 443125.

It can be written as a sum of positive squares in only one way, i.e., 506944 + 14400 = 712^2 + 120^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1909 + ... + 2164.

2⁵²¹³⁴⁴ is an apocalyptic number.

It is an amenable number.

521344 is a deficient number, since it is larger than the sum of its proper divisors (517526).

521344 is an equidigital number, since it uses as much as digits as its factorization.

521344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087 (or 4075 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 521344 is about 722.0415500510. The cubic root of 521344 is about 80.4837357675.

Adding to 521344 its reverse (443125), we get a palindrome (964469).

The spelling of 521344 in words is "five hundred twenty-one thousand, three hundred forty-four".