3521866 has 8 divisors (see below), whose sum is σ = 5298084. Its totient is φ = 1755840.

The previous prime is 3521857. The next prime is 3521867. The reversal of 3521866 is 6681253.

It can be written as a sum of positive squares in 2 ways, for example, as 3515625 + 6241 = 1875^2 + 79^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3521867) 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 3 ways as a sum of consecutive naturals, for example, 1615 + ... + 3106.

Almost surely, 2^3521866 is an apocalyptic number.

3521866 is a deficient number, since it is larger than the sum of its proper divisors (1776218).

3521866 is a wasteful number, since it uses less digits than its factorization.

3521866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096.

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

The square root of 3521866 is about 1876.6635287126. The cubic root of 3521866 is about 152.1449736415.

The spelling of 3521866 in words is "three million, five hundred twenty-one thousand, eight hundred sixty-six".