3281105 has 4 divisors (see below), whose sum is σ = 3937332. Its totient is φ = 2624880.

The previous prime is 3281101. The next prime is 3281137. The reversal of 3281105 is 5011823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5011823 = 691 ⋅7253.

It can be written as a sum of positive squares in 2 ways, for example, as 2588881 + 692224 = 1609^2 + 832^2 .

It is not a de Polignac number, because 3281105 - 2² = 3281101 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3281101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328106 + ... + 328115.

It is an arithmetic number, because the mean of its divisors is an integer number (984333).

Almost surely, 2^3281105 is an apocalyptic number.

It is an amenable number.

3281105 is a deficient number, since it is larger than the sum of its proper divisors (656227).

3281105 is an equidigital number, since it uses as much as digits as its factorization.

3281105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656226.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 3281105 is about 1811.3820690291. The cubic root of 3281105 is about 148.5958599140.

Adding to 3281105 its reverse (5011823), we get a palindrome (8292928).

The spelling of 3281105 in words is "three million, two hundred eighty-one thousand, one hundred five".