1281708341 has 2 divisors, whose sum is σ = 1281708342. Its totient is φ = 1281708340.

The previous prime is 1281708301. The next prime is 1281708343. The reversal of 1281708341 is 1438071821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263518116 + 18190225 = 35546^2 + 4265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281708341 is a prime.

Together with 1281708343, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281708343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640854170 + 640854171.

It is an arithmetic number, because the mean of its divisors is an integer number (640854171).

Almost surely, 2^1281708341 is an apocalyptic number.

It is an amenable number.

1281708341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281708341 is an equidigital number, since it uses as much as digits as its factorization.

1281708341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1281708341 is about 35800.9544705166. The cubic root of 1281708341 is about 1086.2498684563.

The spelling of 1281708341 in words is "one billion, two hundred eighty-one million, seven hundred eight thousand, three hundred forty-one".