521632 has 12 divisors (see below), whose sum is σ = 1027026. Its totient is φ = 260800.

The previous prime is 521603. The next prime is 521641. The reversal of 521632 is 236125.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 364816 + 156816 = 604^2 + 396^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

521632 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 8119 + ... + 8182.

2⁵²¹⁶³² is an apocalyptic number.

It is an amenable number.

521632 is a deficient number, since it is larger than the sum of its proper divisors (505394).

521632 is a wasteful number, since it uses less digits than its factorization.

521632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16311 (or 16303 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 521632 is about 722.2409570220. The cubic root of 521632 is about 80.4985532706.

Adding to 521632 its reverse (236125), we get a palindrome (757757).

The spelling of 521632 in words is "five hundred twenty-one thousand, six hundred thirty-two".