3521225 has 12 divisors (see below), whose sum is σ = 4439820. Its totient is φ = 2769600.

The previous prime is 3521201. The next prime is 3521237. The reversal of 3521225 is 5221253.

It can be written as a sum of positive squares in 6 ways, for example, as 234256 + 3286969 = 484^2 + 1813^2 .

It is not a de Polignac number, because 3521225 - 2¹⁰ = 3520201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3521197 and 3521206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371 + ... + 2679.

It is an arithmetic number, because the mean of its divisors is an integer number (369985).

Almost surely, 2^3521225 is an apocalyptic number.

It is an amenable number.

3521225 is a deficient number, since it is larger than the sum of its proper divisors (918595).

3521225 is a wasteful number, since it uses less digits than its factorization.

3521225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380 (or 2375 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 3521225 is about 1876.4927391280. The cubic root of 3521225 is about 152.1357426594.

Adding to 3521225 its reverse (5221253), we get a palindrome (8742478).

The spelling of 3521225 in words is "three million, five hundred twenty-one thousand, two hundred twenty-five".