3530521 has 4 divisors (see below), whose sum is σ = 3539812. Its totient is φ = 3521232.

The previous prime is 3530519. The next prime is 3530537. The reversal of 3530521 is 1250353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250353 = 13 ⋅96181.

It can be written as a sum of positive squares in 2 ways, for example, as 1354896 + 2175625 = 1164^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 3530521 - 2¹ = 3530519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3530591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4050 + ... + 4843.

It is an arithmetic number, because the mean of its divisors is an integer number (884953).

Almost surely, 2^3530521 is an apocalyptic number.

It is an amenable number.

3530521 is a deficient number, since it is larger than the sum of its proper divisors (9291).

3530521 is an equidigital number, since it uses as much as digits as its factorization.

3530521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9290.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 3530521 is about 1878.9680678500. The cubic root of 3530521 is about 152.2695039828.

Adding to 3530521 its reverse (1250353), we get a palindrome (4780874).

The spelling of 3530521 in words is "three million, five hundred thirty thousand, five hundred twenty-one".