3201861 has 32 divisors (see below), whose sum is σ = 5040000. Its totient is φ = 1790208.

The previous prime is 3201857. The next prime is 3201893. The reversal of 3201861 is 1681023.

3201861 = T₁₇₃ + T₁₇₄ + ... + T₂₈₉.

3201861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3201861 - 2² = 3201857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3201851) 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 31 ways as a sum of consecutive naturals, for example, 21415 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

Almost surely, 2^3201861 is an apocalyptic number.

It is an amenable number.

3201861 is a deficient number, since it is larger than the sum of its proper divisors (1838139).

3201861 is a wasteful number, since it uses less digits than its factorization.

3201861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3201861 is about 1789.3744717079. The cubic root of 3201861 is about 147.3898210039.

Adding to 3201861 its reverse (1681023), we get a palindrome (4882884).

The spelling of 3201861 in words is "three million, two hundred one thousand, eight hundred sixty-one".