1278283243271 has 4 divisors (see below), whose sum is σ = 1278291285000. Its totient is φ = 1278275201544.

The previous prime is 1278283243247. The next prime is 1278283243277. The reversal of 1278283243271 is 1723423828721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1278283243271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278283243277) 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, 3777521 + ... + 4101978.

It is an arithmetic number, because the mean of its divisors is an integer number (319572821250).

Almost surely, 2^{1278283243271} is an apocalyptic number.

1278283243271 is a deficient number, since it is larger than the sum of its proper divisors (8041729).

1278283243271 is an equidigital number, since it uses as much as digits as its factorization.

1278283243271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041728.

The product of its digits is 1806336, while the sum is 50.

The spelling of 1278283243271 in words is "one trillion, two hundred seventy-eight billion, two hundred eighty-three million, two hundred forty-three thousand, two hundred seventy-one".