1278163 has 2 divisors, whose sum is σ = 1278164. Its totient is φ = 1278162.

The previous prime is 1278139. The next prime is 1278181. The reversal of 1278163 is 3618721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1278163 - 2⁵ = 1278131 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (1278113) 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, 639081 + 639082.

It is an arithmetic number, because the mean of its divisors is an integer number (639082).

2^1278163 is an apocalyptic number.

1278163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278163 is an equidigital number, since it uses as much as digits as its factorization.

1278163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 1278163 is about 1130.5587114343. The cubic root of 1278163 is about 108.5247382838.

It can be divided in two parts, 1278 and 163, that added together give a palindrome (1441).

The spelling of 1278163 in words is "one million, two hundred seventy-eight thousand, one hundred sixty-three".