1868321 has 16 divisors (see below), whose sum is σ = 2352000. Its totient is φ = 1474704.

The previous prime is 1868309. The next prime is 1868333. The reversal of 1868321 is 1238681.

It is an interprime number because it is at equal distance from previous prime (1868309) and next prime (1868333).

It is not a de Polignac number, because 1868321 - 2⁶ = 1868257 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1868371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4250 + ... + 4668.

It is an arithmetic number, because the mean of its divisors is an integer number (147000).

2^1868321 is an apocalyptic number.

It is an amenable number.

1868321 is a deficient number, since it is larger than the sum of its proper divisors (483679).

1868321 is an equidigital number, since it uses as much as digits as its factorization.

1868321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 439 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1868321 is about 1366.8653920559. The cubic root of 1868321 is about 123.1640132496.

The spelling of 1868321 in words is "one million, eight hundred sixty-eight thousand, three hundred twenty-one".