3502521 has 20 divisors (see below), whose sum is σ = 5709264. Its totient is φ = 2122200.

The previous prime is 3502519. The next prime is 3502529. The reversal of 3502521 is 1252053.

It is a happy number.

It is not a de Polignac number, because 3502521 - 2¹ = 3502519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3502494 and 3502503.

It is not an unprimeable number, because it can be changed into a prime (3502529) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1075 + ... + 2856.

Almost surely, 2^3502521 is an apocalyptic number.

It is an amenable number.

3502521 is a deficient number, since it is larger than the sum of its proper divisors (2206743).

3502521 is a wasteful number, since it uses less digits than its factorization.

3502521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954 (or 3945 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 3502521 is about 1871.5023376956. The cubic root of 3502521 is about 151.8658933726.

Adding to 3502521 its reverse (1252053), we get a palindrome (4754574).

The spelling of 3502521 in words is "three million, five hundred two thousand, five hundred twenty-one".