521422 has 16 divisors (see below), whose sum is σ = 864432. Its totient is φ = 233920.

The previous prime is 521401. The next prime is 521429. The reversal of 521422 is 224125.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 521396 and 521405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521429) by changing a digit.

521422 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2928 + ... + 3100.

It is an arithmetic number, because the mean of its divisors is an integer number (54027).

2⁵²¹⁴²² is an apocalyptic number.

521422 is a deficient number, since it is larger than the sum of its proper divisors (343010).

521422 is a wasteful number, since it uses less digits than its factorization.

521422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its digits is 160, while the sum is 16.

The square root of 521422 is about 722.0955615429. The cubic root of 521422 is about 80.4877493799.

Adding to 521422 its reverse (224125), we get a palindrome (745547).

The spelling of 521422 in words is "five hundred twenty-one thousand, four hundred twenty-two".