3271921 has 4 divisors (see below), whose sum is σ = 3295600. Its totient is φ = 3248244.

The previous prime is 3271903. The next prime is 3271927. The reversal of 3271921 is 1291723.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1291723 = 103 ⋅12541.

It is a cyclic number.

It is not a de Polignac number, because 3271921 - 2⁵ = 3271889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3271927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11631 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (823900).

Almost surely, 2^3271921 is an apocalyptic number.

It is an amenable number.

3271921 is a deficient number, since it is larger than the sum of its proper divisors (23679).

3271921 is a wasteful number, since it uses less digits than its factorization.

3271921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23678.

The product of its digits is 756, while the sum is 25.

The square root of 3271921 is about 1808.8452117304. The cubic root of 3271921 is about 148.4570875943.

The spelling of 3271921 in words is "three million, two hundred seventy-one thousand, nine hundred twenty-one".