515239 has 4 divisors (see below), whose sum is σ = 519424. Its totient is φ = 511056.

The previous prime is 515237. The next prime is 515279. The reversal of 515239 is 932515.

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

It is a cyclic number.

It is not a de Polignac number, because 515239 - 2¹ = 515237 is a prime.

It is a d-powerful number, because it can be written as 5² + 1 + 2¹⁶ + 5⁸ + 3 + 9⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1902 + ... + 2155.

It is an arithmetic number, because the mean of its divisors is an integer number (129856).

2⁵¹⁵²³⁹ is an apocalyptic number.

515239 is a deficient number, since it is larger than the sum of its proper divisors (4185).

515239 is a wasteful number, since it uses less digits than its factorization.

515239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184.

The product of its digits is 1350, while the sum is 25.

The square root of 515239 is about 717.8015045958. The cubic root of 515239 is about 80.1683434243.

The spelling of 515239 in words is "five hundred fifteen thousand, two hundred thirty-nine".