1296665143 has 2 divisors, whose sum is σ = 1296665144. Its totient is φ = 1296665142.

The previous prime is 1296665113. The next prime is 1296665147. The reversal of 1296665143 is 3415666921.

It is a strong prime.

It is an emirp because it is prime and its reverse (3415666921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1296665143 - 2²¹ = 1294567991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296665143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296665147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648332571 + 648332572.

It is an arithmetic number, because the mean of its divisors is an integer number (648332572).

Almost surely, 2^1296665143 is an apocalyptic number.

1296665143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296665143 is an equidigital number, since it uses as much as digits as its factorization.

1296665143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 1296665143 is about 36009.2369122146. The cubic root of 1296665143 is about 1090.4588430961.

The spelling of 1296665143 in words is "one billion, two hundred ninety-six million, six hundred sixty-five thousand, one hundred forty-three".