1296857130689 has 4 divisors (see below), whose sum is σ = 1297871093760. Its totient is φ = 1295843167620.

The previous prime is 1296857130641. The next prime is 1296857130703. The reversal of 1296857130689 is 9860317586921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1296857130689 is a prime.

It is a super-2 number, since 2×1296857130689² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1296857132689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506979617 + ... + 506982174.

It is an arithmetic number, because the mean of its divisors is an integer number (324467773440).

Almost surely, 2^{1296857130689} is an apocalyptic number.

It is an amenable number.

1296857130689 is a deficient number, since it is larger than the sum of its proper divisors (1013963071).

1296857130689 is a wasteful number, since it uses less digits than its factorization.

1296857130689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013963070.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 1296857130689 in words is "one trillion, two hundred ninety-six billion, eight hundred fifty-seven million, one hundred thirty thousand, six hundred eighty-nine".