1376321 has 2 divisors, whose sum is σ = 1376322. Its totient is φ = 1376320.

The previous prime is 1376317. The next prime is 1376339. The reversal of 1376321 is 1236731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703921 + 672400 = 839^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376321 - 2² = 1376317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1376621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688160 + 688161.

It is an arithmetic number, because the mean of its divisors is an integer number (688161).

2^1376321 is an apocalyptic number.

It is an amenable number.

1376321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376321 is an equidigital number, since it uses as much as digits as its factorization.

1376321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 1376321 is about 1173.1670810247. The cubic root of 1376321 is about 111.2346037693.

The spelling of 1376321 in words is "one million, three hundred seventy-six thousand, three hundred twenty-one".