504241021 has 2 divisors, whose sum is σ = 504241022. Its totient is φ = 504241020.

The previous prime is 504241013. The next prime is 504241027. The reversal of 504241021 is 120142405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502252921 + 1988100 = 22411^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 504241021 - 2³ = 504241013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 504241021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504241027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252120510 + 252120511.

It is an arithmetic number, because the mean of its divisors is an integer number (252120511).

Almost surely, 2^504241021 is an apocalyptic number.

It is an amenable number.

504241021 is a deficient number, since it is larger than the sum of its proper divisors (1).

504241021 is an equidigital number, since it uses as much as digits as its factorization.

504241021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 504241021 is about 22455.3116433507. The cubic root of 504241021 is about 795.9382780227.

Adding to 504241021 its reverse (120142405), we get a palindrome (624383426).

The spelling of 504241021 in words is "five hundred four million, two hundred forty-one thousand, twenty-one".