1277321 has 2 divisors, whose sum is σ = 1277322. Its totient is φ = 1277320.

The previous prime is 1277299. The next prime is 1277323. The reversal of 1277321 is 1237721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 287296 = 995^2 + 536^2 .

It is an emirp because it is prime and its reverse (1237721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1277321 - 2⁶ = 1277257 is a prime.

Together with 1277323, 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 (1277323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638660 + 638661.

It is an arithmetic number, because the mean of its divisors is an integer number (638661).

2^1277321 is an apocalyptic number.

It is an amenable number.

1277321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277321 is an equidigital number, since it uses as much as digits as its factorization.

1277321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 23.

The square root of 1277321 is about 1130.1862678338. The cubic root of 1277321 is about 108.5009025387.

The spelling of 1277321 in words is "one million, two hundred seventy-seven thousand, three hundred twenty-one".