3281861 has 16 divisors (see below), whose sum is σ = 3743808. Its totient is φ = 2851200.

The previous prime is 3281857. The next prime is 3281909. The reversal of 3281861 is 1681823.

It is not a de Polignac number, because 3281861 - 2² = 3281857 is a prime.

It is a super-2 number, since 2×3281861² = 21541223246642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44921 + ... + 44993.

It is an arithmetic number, because the mean of its divisors is an integer number (233988).

Almost surely, 2^3281861 is an apocalyptic number.

It is an amenable number.

3281861 is a deficient number, since it is larger than the sum of its proper divisors (461947).

3281861 is a wasteful number, since it uses less digits than its factorization.

3281861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212.

The product of its digits is 2304, while the sum is 29.

The square root of 3281861 is about 1811.5907374460. The cubic root of 3281861 is about 148.6072717039.

The spelling of 3281861 in words is "three million, two hundred eighty-one thousand, eight hundred sixty-one".