3521525 has 12 divisors (see below), whose sum is σ = 4990752. Its totient is φ = 2414640.

The previous prime is 3521519. The next prime is 3521527. The reversal of 3521525 is 5251253.

It is not a de Polignac number, because 3521525 - 2¹² = 3517429 is a prime.

It is a super-2 number, since 2×3521525² = 24802276651250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3521525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9887 + ... + 10236.

It is an arithmetic number, because the mean of its divisors is an integer number (415896).

Almost surely, 2^3521525 is an apocalyptic number.

3521525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3521525 is a deficient number, since it is larger than the sum of its proper divisors (1469227).

3521525 is a wasteful number, since it uses less digits than its factorization.

3521525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20140 (or 20135 counting only the distinct ones).

The product of its digits is 1500, while the sum is 23.

The square root of 3521525 is about 1876.5726737859. The cubic root of 3521525 is about 152.1400630713.

Adding to 3521525 its reverse (5251253), we get a palindrome (8772778).

The spelling of 3521525 in words is "three million, five hundred twenty-one thousand, five hundred twenty-five".