512205742 has 4 divisors (see below), whose sum is σ = 768308616. Its totient is φ = 256102870.

The previous prime is 512205739. The next prime is 512205779. The reversal of 512205742 is 247502215.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 512205742.

It is a congruent number.

It is an unprimeable number.

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, 128051434 + ... + 128051437.

It is an arithmetic number, because the mean of its divisors is an integer number (192077154).

Almost surely, 2^512205742 is an apocalyptic number.

512205742 is a deficient number, since it is larger than the sum of its proper divisors (256102874).

512205742 is a wasteful number, since it uses less digits than its factorization.

512205742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256102873.

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

The square root of 512205742 is about 22631.9628401957. The cubic root of 512205742 is about 800.1071429415.

Adding to 512205742 its reverse (247502215), we get a palindrome (759707957).

The spelling of 512205742 in words is "five hundred twelve million, two hundred five thousand, seven hundred forty-two".