504045721 has 2 divisors, whose sum is σ = 504045722. Its totient is φ = 504045720.

The previous prime is 504045697. The next prime is 504045727. The reversal of 504045721 is 127540405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308353600 + 195692121 = 17560^2 + 13989^2 .

It is a cyclic number.

It is not a de Polignac number, because 504045721 - 2⁹ = 504045209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 504045721.

It is not a weakly prime, because it can be changed into another prime (504045727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252022860 + 252022861.

It is an arithmetic number, because the mean of its divisors is an integer number (252022861).

Almost surely, 2^504045721 is an apocalyptic number.

It is an amenable number.

504045721 is a deficient number, since it is larger than the sum of its proper divisors (1).

504045721 is an equidigital number, since it uses as much as digits as its factorization.

504045721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 504045721 is about 22450.9625851543. The cubic root of 504045721 is about 795.8355052001.

The spelling of 504045721 in words is "five hundred four million, forty-five thousand, seven hundred twenty-one".