501985 has 8 divisors (see below), whose sum is σ = 657216. Its totient is φ = 365040.

The previous prime is 501971. The next prime is 501997. The reversal of 501985 is 589105.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 501985 - 2⁵ = 501953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4509 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (82152).

2⁵⁰¹⁹⁸⁵ is an apocalyptic number.

501985 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

501985 is a deficient number, since it is larger than the sum of its proper divisors (155231).

501985 is a wasteful number, since it uses less digits than its factorization.

501985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 501985 is about 708.5089978257. The cubic root of 501985 is about 79.4749469467.

The spelling of 501985 in words is "five hundred one thousand, nine hundred eighty-five".