3281905 has 8 divisors (see below), whose sum is σ = 4296384. Its totient is φ = 2386800.

The previous prime is 3281857. The next prime is 3281909. The reversal of 3281905 is 5091823.

3281905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3281905 - 2⁷ = 3281777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3281909) 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 7 ways as a sum of consecutive naturals, for example, 29781 + ... + 29890.

It is an arithmetic number, because the mean of its divisors is an integer number (537048).

Almost surely, 2^3281905 is an apocalyptic number.

It is an amenable number.

3281905 is a deficient number, since it is larger than the sum of its proper divisors (1014479).

3281905 is a wasteful number, since it uses less digits than its factorization.

3281905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59687.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 3281905 is about 1811.6028814285. The cubic root of 3281905 is about 148.6079358282.

It can be divided in two parts, 3281 and 905, that added together give a triangular number (4186 = T₉₁).

The spelling of 3281905 in words is "three million, two hundred eighty-one thousand, nine hundred five".