3018321 has 18 divisors (see below), whose sum is σ = 4606290. Its totient is φ = 1904256.

The previous prime is 3018317. The next prime is 3018329. The reversal of 3018321 is 1238103.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 1299600 = 1311^2 + 1140^2 .

It is not a de Polignac number, because 3018321 - 2² = 3018317 is a prime.

It is a super-2 number, since 2×3018321² = 18220523318082, which contains 22 as substring.

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

3018321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3018294 and 3018303.

It is not an unprimeable number, because it can be changed into a prime (3018329) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2785 + ... + 3713.

It is an arithmetic number, because the mean of its divisors is an integer number (255905).

Almost surely, 2^3018321 is an apocalyptic number.

3018321 is the 929-th nonagonal number.

It is an amenable number.

3018321 is a deficient number, since it is larger than the sum of its proper divisors (1587969).

3018321 is a wasteful number, since it uses less digits than its factorization.

3018321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 3018321 is about 1737.3315745706. The cubic root of 3018321 is about 144.5179553284.

The spelling of 3018321 in words is "three million, eighteen thousand, three hundred twenty-one".