501220 has 24 divisors (see below), whose sum is σ = 1108800. Its totient is φ = 189792.

The previous prime is 501217. The next prime is 501223. The reversal of 501220 is 22105.

It is an interprime number because it is at equal distance from previous prime (501217) and next prime (501223).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 501197 and 501206.

It is not an unprimeable number, because it can be changed into a prime (501223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2⁵⁰¹²²⁰ is an apocalyptic number.

It is an amenable number.

501220 is an abundant number, since it is smaller than the sum of its proper divisors (607580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

501220 is a wasteful number, since it uses less digits than its factorization.

501220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 501220 is about 707.9689258718. The cubic root of 501220 is about 79.4345544747.

Adding to 501220 its reverse (22105), we get a palindrome (523325).

The spelling of 501220 in words is "five hundred one thousand, two hundred twenty".