504755021 has 2 divisors, whose sum is σ = 504755022. Its totient is φ = 504755020.

The previous prime is 504754997. The next prime is 504755081. The reversal of 504755021 is 120557405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357739396 + 147015625 = 18914^2 + 12125^2 .

It is a cyclic number.

It is not a de Polignac number, because 504755021 - 2²² = 500560717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504755081) 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, 252377510 + 252377511.

It is an arithmetic number, because the mean of its divisors is an integer number (252377511).

Almost surely, 2^504755021 is an apocalyptic number.

It is an amenable number.

504755021 is a deficient number, since it is larger than the sum of its proper divisors (1).

504755021 is an equidigital number, since it uses as much as digits as its factorization.

504755021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 504755021 is about 22466.7536818295. The cubic root of 504755021 is about 796.2086337498.

The spelling of 504755021 in words is "five hundred four million, seven hundred fifty-five thousand, twenty-one".