505915 has 4 divisors (see below), whose sum is σ = 607104. Its totient is φ = 404728.

The previous prime is 505907. The next prime is 505919. The reversal of 505915 is 519505.

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 505915 - 2³ = 505907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505915.

It is not an unprimeable number, because it can be changed into a prime (505919) 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, 50587 + ... + 50596.

It is an arithmetic number, because the mean of its divisors is an integer number (151776).

2⁵⁰⁵⁹¹⁵ is an apocalyptic number.

505915 is a deficient number, since it is larger than the sum of its proper divisors (101189).

505915 is a wasteful number, since it uses less digits than its factorization.

505915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101188.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 505915 is about 711.2770205764. The cubic root of 505915 is about 79.6818090259.

The spelling of 505915 in words is "five hundred five thousand, nine hundred fifteen".