515240 has 32 divisors (see below), whose sum is σ = 1265760. Its totient is φ = 187200.

The previous prime is 515237. The next prime is 515279. The reversal of 515240 is 42515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 1025.

It is an arithmetic number, because the mean of its divisors is an integer number (39555).

2⁵¹⁵²⁴⁰ is an apocalyptic number.

It is an amenable number.

515240 is an abundant number, since it is smaller than the sum of its proper divisors (750520).

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

515240 is a wasteful number, since it uses less digits than its factorization.

515240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 515240 is about 717.8022011669. The cubic root of 515240 is about 80.1683952891.

Adding to 515240 its reverse (42515), we get a palindrome (557755).

The spelling of 515240 in words is "five hundred fifteen thousand, two hundred forty".