1271870250281 has 2 divisors, whose sum is σ = 1271870250282. Its totient is φ = 1271870250280.

The previous prime is 1271870250269. The next prime is 1271870250311. The reversal of 1271870250281 is 1820520781721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1268788224025 + 3082026256 = 1126405^2 + 55516^2 .

It is an emirp because it is prime and its reverse (1820520781721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1271870250281 - 2³⁸ = 996992343337 is a prime.

It is a super-2 number, since 2×1271870250281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1271872250281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635935125140 + 635935125141.

It is an arithmetic number, because the mean of its divisors is an integer number (635935125141).

Almost surely, 2^{1271870250281} is an apocalyptic number.

It is an amenable number.

1271870250281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271870250281 is an equidigital number, since it uses as much as digits as its factorization.

1271870250281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 44.

The spelling of 1271870250281 in words is "one trillion, two hundred seventy-one billion, eight hundred seventy million, two hundred fifty thousand, two hundred eighty-one".