504421081 has 2 divisors, whose sum is σ = 504421082. Its totient is φ = 504421080.

The previous prime is 504421079. The next prime is 504421147. The reversal of 504421081 is 180124405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504406681 + 14400 = 22459^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 504421081 - 2¹ = 504421079 is a prime.

It is a super-2 number, since 2×504421081² = 508881253914417122, which contains 22 as substring.

Together with 504421079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (504421051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252210540 + 252210541.

It is an arithmetic number, because the mean of its divisors is an integer number (252210541).

Almost surely, 2^504421081 is an apocalyptic number.

It is an amenable number.

504421081 is a deficient number, since it is larger than the sum of its proper divisors (1).

504421081 is an equidigital number, since it uses as much as digits as its factorization.

504421081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 504421081 is about 22459.3205818876. The cubic root of 504421081 is about 796.0330075831.

Adding to 504421081 its reverse (180124405), we get a palindrome (684545486).

The spelling of 504421081 in words is "five hundred four million, four hundred twenty-one thousand, eighty-one".