3561866 has 32 divisors (see below), whose sum is σ = 6756480. Its totient is φ = 1368000.

The previous prime is 3561853. The next prime is 3561881. The reversal of 3561866 is 6681653.

3561866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 15440 + ... + 15668.

It is an arithmetic number, because the mean of its divisors is an integer number (211140).

Almost surely, 2^3561866 is an apocalyptic number.

3561866 is a deficient number, since it is larger than the sum of its proper divisors (3194614).

3561866 is a wasteful number, since it uses less digits than its factorization.

3561866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350.

The product of its digits is 25920, while the sum is 35.

The square root of 3561866 is about 1887.2906506418. The cubic root of 3561866 is about 152.7188080025.

It can be divided in two parts, 356 and 1866, that added together give a palindrome (2222).

The spelling of 3561866 in words is "three million, five hundred sixty-one thousand, eight hundred sixty-six".