512642540 has 24 divisors (see below), whose sum is σ = 1077420960. Its totient is φ = 204891008.

The previous prime is 512642521. The next prime is 512642549. The reversal of 512642540 is 45246215.

It is not an unprimeable number, because it can be changed into a prime (512642549) 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 in 7 ways as a sum of consecutive naturals, for example, 16664 + ... + 36096.

It is an arithmetic number, because the mean of its divisors is an integer number (44892540).

Almost surely, 2^512642540 is an apocalyptic number.

It is an amenable number.

512642540 is an abundant number, since it is smaller than the sum of its proper divisors (564778420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512642540 is a wasteful number, since it uses less digits than its factorization.

512642540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20761 (or 20759 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 512642540 is about 22641.6108084209. The cubic root of 512642540 is about 800.3345163540.

Adding to 512642540 its reverse (45246215), we get a palindrome (557888755).

The spelling of 512642540 in words is "five hundred twelve million, six hundred forty-two thousand, five hundred forty".