3818321 has 4 divisors (see below), whose sum is σ = 4112052. Its totient is φ = 3524592.

The previous prime is 3818317. The next prime is 3818329. The reversal of 3818321 is 1238183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1238183 = 251 ⋅4933.

It can be written as a sum of positive squares in 2 ways, for example, as 250000 + 3568321 = 500^2 + 1889^2 .

It is a cyclic number.

It is not a de Polignac number, because 3818321 - 2² = 3818317 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3818329) 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, 146846 + ... + 146871.

It is an arithmetic number, because the mean of its divisors is an integer number (1028013).

Almost surely, 2^3818321 is an apocalyptic number.

It is an amenable number.

3818321 is a deficient number, since it is larger than the sum of its proper divisors (293731).

3818321 is a wasteful number, since it uses less digits than its factorization.

3818321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293730.

The product of its digits is 1152, while the sum is 26.

The square root of 3818321 is about 1954.0524557954. The cubic root of 3818321 is about 156.2994603952.

The spelling of 3818321 in words is "three million, eight hundred eighteen thousand, three hundred twenty-one".