1319321 has 2 divisors, whose sum is σ = 1319322. Its totient is φ = 1319320.

The previous prime is 1319293. The next prime is 1319323. The reversal of 1319321 is 1239131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1125721 + 193600 = 1061^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319321 - 2¹⁴ = 1302937 is a prime.

Together with 1319323, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1319293 and 1319302.

It is not a weakly prime, because it can be changed into another prime (1319323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659660 + 659661.

It is an arithmetic number, because the mean of its divisors is an integer number (659661).

2^1319321 is an apocalyptic number.

It is an amenable number.

1319321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319321 is an equidigital number, since it uses as much as digits as its factorization.

1319321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 1319321 is about 1148.6169944764. The cubic root of 1319321 is about 109.6773188143.

The spelling of 1319321 in words is "one million, three hundred nineteen thousand, three hundred twenty-one".