3521686 has 16 divisors (see below), whose sum is σ = 6392736. Its totient is φ = 1420416.

The previous prime is 3521677. The next prime is 3521689. The reversal of 3521686 is 6861253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7161 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (399546).

Almost surely, 2^3521686 is an apocalyptic number.

3521686 is a deficient number, since it is larger than the sum of its proper divisors (2871050).

3521686 is a wasteful number, since it uses less digits than its factorization.

3521686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14823.

The product of its digits is 8640, while the sum is 31.

The square root of 3521686 is about 1876.6155706484. The cubic root of 3521686 is about 152.1423815911.

The spelling of 3521686 in words is "three million, five hundred twenty-one thousand, six hundred eighty-six".