1281238536341 has 2 divisors, whose sum is σ = 1281238536342. Its totient is φ = 1281238536340.

The previous prime is 1281238536311. The next prime is 1281238536463. The reversal of 1281238536341 is 1436358321821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1235534510116 + 45704026225 = 1111546^2 + 213785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281238536341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281238536311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640619268170 + 640619268171.

It is an arithmetic number, because the mean of its divisors is an integer number (640619268171).

Almost surely, 2^{1281238536341} is an apocalyptic number.

It is an amenable number.

1281238536341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281238536341 is an equidigital number, since it uses as much as digits as its factorization.

1281238536341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 47.

The spelling of 1281238536341 in words is "one trillion, two hundred eighty-one billion, two hundred thirty-eight million, five hundred thirty-six thousand, three hundred forty-one".