504421 has 4 divisors (see below), whose sum is σ = 518092. Its totient is φ = 490752.

The previous prime is 504403. The next prime is 504457. The reversal of 504421 is 124405.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 96100 = 639^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 504421 - 2⁵ = 504389 is a prime.

It is an Ulam number.

It is a Duffinian number.

504421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 504395 and 504404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504461) 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 3 ways as a sum of consecutive naturals, for example, 6780 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (129523).

2⁵⁰⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

504421 is a deficient number, since it is larger than the sum of its proper divisors (13671).

504421 is a wasteful number, since it uses less digits than its factorization.

504421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13670.

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

The square root of 504421 is about 710.2260203625. The cubic root of 504421 is about 79.6032964974.

Subtracting from 504421 its sum of digits (16), we obtain a palindrome (504405).

Adding to 504421 its reverse (124405), we get a palindrome (628826).

The spelling of 504421 in words is "five hundred four thousand, four hundred twenty-one".