515009 has 4 divisors (see below), whose sum is σ = 561840. Its totient is φ = 468180.

The previous prime is 514967. The next prime is 515041. The reversal of 515009 is 900515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 515009 - 2¹⁶ = 449473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (515089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23399 + ... + 23420.

It is an arithmetic number, because the mean of its divisors is an integer number (140460).

2⁵¹⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

515009 is a deficient number, since it is larger than the sum of its proper divisors (46831).

515009 is a wasteful number, since it uses less digits than its factorization.

515009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46830.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 515009 is about 717.6412752901. The cubic root of 515009 is about 80.1564127389.

The spelling of 515009 in words is "five hundred fifteen thousand, nine".