3502221 has 16 divisors (see below), whose sum is σ = 5062464. Its totient is φ = 2145024.

The previous prime is 3502207. The next prime is 3502231. The reversal of 3502221 is 1222053.

3502221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3502221 - 2⁵ = 3502189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3502221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3502231) 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 15 ways as a sum of consecutive naturals, for example, 1395 + ... + 2991.

It is an arithmetic number, because the mean of its divisors is an integer number (316404).

Almost surely, 2^3502221 is an apocalyptic number.

It is an amenable number.

3502221 is a deficient number, since it is larger than the sum of its proper divisors (1560243).

3502221 is a wasteful number, since it uses less digits than its factorization.

3502221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3502221 is about 1871.4221864668. The cubic root of 3502221 is about 151.8615573463.

Adding to 3502221 its reverse (1222053), we get a palindrome (4724274).

The spelling of 3502221 in words is "three million, five hundred two thousand, two hundred twenty-one".