3520643 has 16 divisors (see below), whose sum is σ = 4293120. Its totient is φ = 2820096.

The previous prime is 3520613. The next prime is 3520663. The reversal of 3520643 is 3460253.

3520643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3520643 - 2⁶ = 3520579 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13571 + ... + 13827.

It is an arithmetic number, because the mean of its divisors is an integer number (268320).

Almost surely, 2^3520643 is an apocalyptic number.

3520643 is a deficient number, since it is larger than the sum of its proper divisors (772477).

3520643 is a wasteful number, since it uses less digits than its factorization.

3520643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 3520643 is about 1876.3376561803. The cubic root of 3520643 is about 152.1273603606.

Adding to 3520643 its reverse (3460253), we get a palindrome (6980896).

The spelling of 3520643 in words is "three million, five hundred twenty thousand, six hundred forty-three".