1378842271 has 2 divisors, whose sum is σ = 1378842272. Its totient is φ = 1378842270.

The previous prime is 1378842263. The next prime is 1378842281. The reversal of 1378842271 is 1722488731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378842271 - 2³ = 1378842263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378842281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689421135 + 689421136.

It is an arithmetic number, because the mean of its divisors is an integer number (689421136).

Almost surely, 2^1378842271 is an apocalyptic number.

1378842271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378842271 is an equidigital number, since it uses as much as digits as its factorization.

1378842271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 1378842271 is about 37132.7654639403. The cubic root of 1378842271 is about 1113.0248558413.

The spelling of 1378842271 in words is "one billion, three hundred seventy-eight million, eight hundred forty-two thousand, two hundred seventy-one".