515442 has 16 divisors (see below), whose sum is σ = 1037952. Its totient is φ = 170640.

The previous prime is 515429. The next prime is 515477. The reversal of 515442 is 244515.

515442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

515442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 1468 + ... + 1784.

It is an arithmetic number, because the mean of its divisors is an integer number (64872).

2⁵¹⁵⁴⁴² is an apocalyptic number.

515442 is an abundant number, since it is smaller than the sum of its proper divisors (522510).

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

515442 is a wasteful number, since it uses less digits than its factorization.

515442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its digits is 800, while the sum is 21.

The square root of 515442 is about 717.9428946650. The cubic root of 515442 is about 80.1788706016.

Adding to 515442 its reverse (244515), we get a palindrome (759957).

The spelling of 515442 in words is "five hundred fifteen thousand, four hundred forty-two".