3855321 has 6 divisors (see below), whose sum is σ = 5568810. Its totient is φ = 2570208.

The previous prime is 3855287. The next prime is 3855323. The reversal of 3855321 is 1235583.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 168921 = 1920^2 + 411^2 .

It is not a de Polignac number, because 3855321 - 2¹⁰ = 3854297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3855323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214176 + ... + 214193.

It is an arithmetic number, because the mean of its divisors is an integer number (928135).

Almost surely, 2^3855321 is an apocalyptic number.

It is an amenable number.

3855321 is a deficient number, since it is larger than the sum of its proper divisors (1713489).

3855321 is a wasteful number, since it uses less digits than its factorization.

3855321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428375 (or 428372 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3855321 is about 1963.4971352156. The cubic root of 3855321 is about 156.8026920829.

The spelling of 3855321 in words is "three million, eight hundred fifty-five thousand, three hundred twenty-one".