504271921 has 2 divisors, whose sum is σ = 504271922. Its totient is φ = 504271920.

The previous prime is 504271919. The next prime is 504271967. The reversal of 504271921 is 129172405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438483600 + 65788321 = 20940^2 + 8111^2 .

It is a cyclic number.

It is not a de Polignac number, because 504271921 - 2¹ = 504271919 is a prime.

Together with 504271919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (504271121) by changing a digit.

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 as a sum of consecutive naturals, namely, 252135960 + 252135961.

It is an arithmetic number, because the mean of its divisors is an integer number (252135961).

Almost surely, 2^504271921 is an apocalyptic number.

It is an amenable number.

504271921 is a deficient number, since it is larger than the sum of its proper divisors (1).

504271921 is an equidigital number, since it uses as much as digits as its factorization.

504271921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 504271921 is about 22455.9996660135. Note that the first 3 decimals coincide. The cubic root of 504271921 is about 795.9545361145.

The spelling of 504271921 in words is "five hundred four million, two hundred seventy-one thousand, nine hundred twenty-one".