1271398144 has 36 divisors (see below), whose sum is σ = 2606439304. Its totient is φ = 618513408.

The previous prime is 1271398123. The next prime is 1271398187. The reversal of 1271398144 is 4418931721.

It is a junction number, because it is equal to n+sod(n) for n = 1271398097 and 1271398106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57642 + ... + 76585.

Almost surely, 2^1271398144 is an apocalyptic number.

It is an amenable number.

1271398144 is an abundant number, since it is smaller than the sum of its proper divisors (1335041160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271398144 is an equidigital number, since it uses as much as digits as its factorization.

1271398144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134280 (or 134266 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 1271398144 is about 35656.6703998004. The cubic root of 1271398144 is about 1083.3293873676.

The spelling of 1271398144 in words is "one billion, two hundred seventy-one million, three hundred ninety-eight thousand, one hundred forty-four".