3831321 has 16 divisors (see below), whose sum is σ = 5680640. Its totient is φ = 2280960.

The previous prime is 3831319. The next prime is 3831329. The reversal of 3831321 is 1231383.

It is a happy number.

It is not a de Polignac number, because 3831321 - 2¹ = 3831319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3831329) 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, 376 + ... + 2793.

It is an arithmetic number, because the mean of its divisors is an integer number (355040).

Almost surely, 2^3831321 is an apocalyptic number.

3831321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3831321 is a deficient number, since it is larger than the sum of its proper divisors (1849319).

3831321 is a wasteful number, since it uses less digits than its factorization.

3831321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its digits is 432, while the sum is 21.

The square root of 3831321 is about 1957.3760497155. The cubic root of 3831321 is about 156.4766404859.

The spelling of 3831321 in words is "three million, eight hundred thirty-one thousand, three hundred twenty-one".