2078321 has 8 divisors (see below), whose sum is σ = 2384640. Its totient is φ = 1774368.

The previous prime is 2078317. The next prime is 2078339. The reversal of 2078321 is 1238702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2078321 - 2² = 2078317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2078311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2165 + ... + 2973.

It is an arithmetic number, because the mean of its divisors is an integer number (298080).

2^2078321 is an apocalyptic number.

It is an amenable number.

2078321 is a deficient number, since it is larger than the sum of its proper divisors (306319).

2078321 is an equidigital number, since it uses as much as digits as its factorization.

2078321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2078321 is about 1441.6383041526. The cubic root of 2078321 is about 127.6157298572.

The spelling of 2078321 in words is "two million, seventy-eight thousand, three hundred twenty-one".