1278323 has 2 divisors, whose sum is σ = 1278324. Its totient is φ = 1278322.

The previous prime is 1278289. The next prime is 1278337. The reversal of 1278323 is 3238721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1278323 - 2¹⁰ = 1277299 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1278292 and 1278301.

It is not a weakly prime, because it can be changed into another prime (1278373) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639161 + 639162.

It is an arithmetic number, because the mean of its divisors is an integer number (639162).

2^1278323 is an apocalyptic number.

1278323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278323 is an equidigital number, since it uses as much as digits as its factorization.

1278323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 1278323 is about 1130.6294706932. The cubic root of 1278323 is about 108.5292664579.

The spelling of 1278323 in words is "one million, two hundred seventy-eight thousand, three hundred twenty-three".