1379321 has 2 divisors, whose sum is σ = 1379322. Its totient is φ = 1379320.

The previous prime is 1379291. The next prime is 1379353. The reversal of 1379321 is 1239731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 287296 = 1045^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379321 - 2¹⁴ = 1362937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1379621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689660 + 689661.

It is an arithmetic number, because the mean of its divisors is an integer number (689661).

2^1379321 is an apocalyptic number.

It is an amenable number.

1379321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379321 is an equidigital number, since it uses as much as digits as its factorization.

1379321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 26.

The square root of 1379321 is about 1174.4449752968. Note that the first 3 decimals coincide. The cubic root of 1379321 is about 111.3153653658.

The spelling of 1379321 in words is "one million, three hundred seventy-nine thousand, three hundred twenty-one".