3501220 has 12 divisors (see below), whose sum is σ = 7352604. Its totient is φ = 1400480.

The previous prime is 3501209. The next prime is 3501229. The reversal of 3501220 is 221053.

3501220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 459684 + 3041536 = 678^2 + 1744^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3501220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3501229) 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 3 ways as a sum of consecutive naturals, for example, 87511 + ... + 87550.

It is an arithmetic number, because the mean of its divisors is an integer number (612717).

Almost surely, 2^3501220 is an apocalyptic number.

It is an amenable number.

3501220 is an abundant number, since it is smaller than the sum of its proper divisors (3851384).

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

3501220 is a wasteful number, since it uses less digits than its factorization.

3501220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175070 (or 175068 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 3501220 is about 1871.1547236934. The cubic root of 3501220 is about 151.8470876804.

Adding to 3501220 its reverse (221053), we get a palindrome (3722273).

It can be divided in two parts, 3501 and 220, that added together give a square (3721 = 61²).

The spelling of 3501220 in words is "three million, five hundred one thousand, two hundred twenty".