1296841387 has 2 divisors, whose sum is σ = 1296841388. Its totient is φ = 1296841386.

The previous prime is 1296841363. The next prime is 1296841397. The reversal of 1296841387 is 7831486921.

It is a strong prime.

It is an emirp because it is prime and its reverse (7831486921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1296841387 - 2¹⁵ = 1296808619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296841387.

It is not a weakly prime, because it can be changed into another prime (1296841397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648420693 + 648420694.

It is an arithmetic number, because the mean of its divisors is an integer number (648420694).

Almost surely, 2^1296841387 is an apocalyptic number.

1296841387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296841387 is an equidigital number, since it uses as much as digits as its factorization.

1296841387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 1296841387 is about 36011.6840344908. The cubic root of 1296841387 is about 1090.5082462702.

The spelling of 1296841387 in words is "one billion, two hundred ninety-six million, eight hundred forty-one thousand, three hundred eighty-seven".