501285 has 16 divisors (see below), whose sum is σ = 837504. Its totient is φ = 255552.

The previous prime is 501271. The next prime is 501287. The reversal of 501285 is 582105.

It is not a de Polignac number, because 501285 - 2⁷ = 501157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (52344).

2⁵⁰¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

501285 is a deficient number, since it is larger than the sum of its proper divisors (336219).

501285 is a wasteful number, since it uses less digits than its factorization.

501285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 501285 is about 708.0148303532. The cubic root of 501285 is about 79.4379881119.

Subtracting from 501285 its sum of digits (21), we obtain a square (501264 = 708²).

The spelling of 501285 in words is "five hundred one thousand, two hundred eighty-five".