1880321 has 2 divisors, whose sum is σ = 1880322. Its totient is φ = 1880320.

The previous prime is 1880309. The next prime is 1880323. The reversal of 1880321 is 1230881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1132096 + 748225 = 1064^2 + 865^2 .

It is an emirp because it is prime and its reverse (1230881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1880321 - 2⁶ = 1880257 is a prime.

Together with 1880323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1880323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 940160 + 940161.

It is an arithmetic number, because the mean of its divisors is an integer number (940161).

2^1880321 is an apocalyptic number.

It is an amenable number.

1880321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1880321 is an equidigital number, since it uses as much as digits as its factorization.

1880321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1880321 is about 1371.2479717396. The cubic root of 1880321 is about 123.4271398985.

The spelling of 1880321 in words is "one million, eight hundred eighty thousand, three hundred twenty-one".