1271250814849 has 4 divisors (see below), whose sum is σ = 1346030274564. Its totient is φ = 1196471355136.

The previous prime is 1271250814777. The next prime is 1271250814861. The reversal of 1271250814849 is 9484180521721.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 784186404849 + 487064410000 = 885543^2 + 697900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271250814849 - 2¹¹ = 1271250812801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1271250814796 and 1271250814805.

It is not an unprimeable number, because it can be changed into a prime (1271250824849) 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, 37389729832 + ... + 37389729865.

It is an arithmetic number, because the mean of its divisors is an integer number (336507568641).

Almost surely, 2^{1271250814849} is an apocalyptic number.

It is an amenable number.

1271250814849 is a deficient number, since it is larger than the sum of its proper divisors (74779459715).

1271250814849 is an equidigital number, since it uses as much as digits as its factorization.

1271250814849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74779459714.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 1271250814849 in words is "one trillion, two hundred seventy-one billion, two hundred fifty million, eight hundred fourteen thousand, eight hundred forty-nine".