3281321 has 4 divisors (see below), whose sum is σ = 3394500. Its totient is φ = 3168144.

The previous prime is 3281303. The next prime is 3281351. The reversal of 3281321 is 1231823.

3281321 = T₂₃₀ + T₂₃₁ + ... + T₃₁₆.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1231823 = 47 ⋅26209.

It can be written as a sum of positive squares in 2 ways, for example, as 1792921 + 1488400 = 1339^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 3281321 - 2¹⁰ = 3280297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3281293 and 3281302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281351) 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, 56546 + ... + 56603.

It is an arithmetic number, because the mean of its divisors is an integer number (848625).

Almost surely, 2^3281321 is an apocalyptic number.

It is an amenable number.

3281321 is a deficient number, since it is larger than the sum of its proper divisors (113179).

3281321 is a wasteful number, since it uses less digits than its factorization.

3281321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113178.

The product of its digits is 288, while the sum is 20.

The square root of 3281321 is about 1811.4416910296. The cubic root of 3281321 is about 148.5991206043.

The spelling of 3281321 in words is "three million, two hundred eighty-one thousand, three hundred twenty-one".