3520013 has 6 divisors (see below), whose sum is σ = 4094766. Its totient is φ = 3017112.

The previous prime is 3520009. The next prime is 3520021. The reversal of 3520013 is 3100253.

It can be written as a sum of positive squares in only one way, i.e., 3087049 + 432964 = 1757^2 + 658^2 .

It is not a de Polignac number, because 3520013 - 2² = 3520009 is a prime.

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 3520013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35870 + ... + 35967.

It is an arithmetic number, because the mean of its divisors is an integer number (682461).

Almost surely, 2^3520013 is an apocalyptic number.

It is an amenable number.

3520013 is a deficient number, since it is larger than the sum of its proper divisors (574753).

3520013 is an equidigital number, since it uses as much as digits as its factorization.

3520013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71851 (or 71844 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 3520013 is about 1876.1697684378. The cubic root of 3520013 is about 152.1182856968.

Adding to 3520013 its reverse (3100253), we get a palindrome (6620266).

The spelling of 3520013 in words is "three million, five hundred twenty thousand, thirteen".