3521020 has 12 divisors (see below), whose sum is σ = 7394184. Its totient is φ = 1408400.

The previous prime is 3520999. The next prime is 3521029. The reversal of 3521020 is 201253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521029) 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, 88006 + ... + 88045.

It is an arithmetic number, because the mean of its divisors is an integer number (616182).

Almost surely, 2^3521020 is an apocalyptic number.

It is an amenable number.

3521020 is an abundant number, since it is smaller than the sum of its proper divisors (3873164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3521020 is a wasteful number, since it uses less digits than its factorization.

3521020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176060 (or 176058 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 3521020 is about 1876.4381151533. The cubic root of 3521020 is about 152.1327902369.

Adding to 3521020 its reverse (201253), we get a palindrome (3722273).

The spelling of 3521020 in words is "three million, five hundred twenty-one thousand, twenty".