1271074641457 has 2 divisors, whose sum is σ = 1271074641458. Its totient is φ = 1271074641456.

The previous prime is 1271074641449. The next prime is 1271074641461. The reversal of 1271074641457 is 7541464701721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1270757943841 + 316697616 = 1127279^2 + 17796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271074641457 - 2³ = 1271074641449 is a prime.

It is a super-2 number, since 2×1271074641457² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1271074641457.

It is not a weakly prime, because it can be changed into another prime (1271074641857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635537320728 + 635537320729.

It is an arithmetic number, because the mean of its divisors is an integer number (635537320729).

Almost surely, 2^{1271074641457} is an apocalyptic number.

It is an amenable number.

1271074641457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271074641457 is an equidigital number, since it uses as much as digits as its factorization.

1271074641457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 1271074641457 in words is "one trillion, two hundred seventy-one billion, seventy-four million, six hundred forty-one thousand, four hundred fifty-seven".