503865 has 12 divisors (see below), whose sum is σ = 873444. Its totient is φ = 268704.

The previous prime is 503857. The next prime is 503869. The reversal of 503865 is 568305.

It can be written as a sum of positive squares in 2 ways, for example, as 147456 + 356409 = 384^2 + 597^2 .

It is not a de Polignac number, because 503865 - 2³ = 503857 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (503869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5554 + ... + 5643.

It is an arithmetic number, because the mean of its divisors is an integer number (72787).

2⁵⁰³⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

503865 is a deficient number, since it is larger than the sum of its proper divisors (369579).

503865 is a wasteful number, since it uses less digits than its factorization.

503865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11208 (or 11205 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 503865 is about 709.8344877505. The cubic root of 503865 is about 79.5740380641.

The spelling of 503865 in words is "five hundred three thousand, eight hundred sixty-five".