3520525 has 12 divisors (see below), whose sum is σ = 4449492. Its totient is φ = 2762240.

The previous prime is 3520519. The next prime is 3520537. The reversal of 3520525 is 5250253.

3520525 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 6 ways, for example, as 8649 + 3511876 = 93^2 + 1874^2 .

It is not a de Polignac number, because 3520525 - 2¹⁷ = 3389453 is a prime.

It is a Duffinian number.

3520525 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3520496 and 3520505.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (370791).

Almost surely, 2^3520525 is an apocalyptic number.

It is an amenable number.

3520525 is a deficient number, since it is larger than the sum of its proper divisors (928967).

3520525 is a wasteful number, since it uses less digits than its factorization.

3520525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 3520525 is about 1876.3062116829. The cubic root of 3520525 is about 152.1256607441.

Adding to 3520525 its reverse (5250253), we get a palindrome (8770778).

The spelling of 3520525 in words is "three million, five hundred twenty thousand, five hundred twenty-five".