504812161 has 12 divisors (see below), whose sum is σ = 621774468. Its totient is φ = 407242752.

The previous prime is 504812111. The next prime is 504812171. The reversal of 504812161 is 161218405.

It can be written as a sum of positive squares in 2 ways, for example, as 406425600 + 98386561 = 20160^2 + 9919^2 .

It is not a de Polignac number, because 504812161 - 2²¹ = 502715009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (504812111) 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 in 11 ways as a sum of consecutive naturals, for example, 302176 + ... + 303841.

It is an arithmetic number, because the mean of its divisors is an integer number (51814539).

Almost surely, 2^504812161 is an apocalyptic number.

It is an amenable number.

504812161 is a deficient number, since it is larger than the sum of its proper divisors (116962307).

504812161 is a wasteful number, since it uses less digits than its factorization.

504812161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606048 (or 606041 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 504812161 is about 22468.0253026384. The cubic root of 504812161 is about 796.2386771324.

The spelling of 504812161 in words is "five hundred four million, eight hundred twelve thousand, one hundred sixty-one".