515642942 has 8 divisors (see below), whose sum is σ = 774719856. Its totient is φ = 257402992.

The previous prime is 515642923. The next prime is 515642947. The reversal of 515642942 is 249246515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 515642896 and 515642905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515642947) 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 3 ways as a sum of consecutive naturals, for example, 207698 + ... + 210165.

It is an arithmetic number, because the mean of its divisors is an integer number (96839982).

Almost surely, 2^515642942 is an apocalyptic number.

515642942 is a deficient number, since it is larger than the sum of its proper divisors (259076914).

515642942 is a wasteful number, since it uses less digits than its factorization.

515642942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418482.

The product of its digits is 86400, while the sum is 38.

The square root of 515642942 is about 22707.7727221320. The cubic root of 515642942 is about 801.8928833335.

The spelling of 515642942 in words is "five hundred fifteen million, six hundred forty-two thousand, nine hundred forty-two".