1278614163 has 4 divisors (see below), whose sum is σ = 1704818888. Its totient is φ = 852409440.

The previous prime is 1278614083. The next prime is 1278614167. The reversal of 1278614163 is 3614168721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3614168721 = 3 ⋅1204722907.

It is not a de Polignac number, because 1278614163 - 2¹⁴ = 1278597779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278614167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213102358 + ... + 213102363.

It is an arithmetic number, because the mean of its divisors is an integer number (426204722).

Almost surely, 2^1278614163 is an apocalyptic number.

1278614163 is a deficient number, since it is larger than the sum of its proper divisors (426204725).

1278614163 is an equidigital number, since it uses as much as digits as its factorization.

1278614163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426204724.

The product of its digits is 48384, while the sum is 39.

The square root of 1278614163 is about 35757.7147340263. The cubic root of 1278614163 is about 1085.3750571820.

The spelling of 1278614163 in words is "one billion, two hundred seventy-eight million, six hundred fourteen thousand, one hundred sixty-three".