1297506384511 has 4 divisors (see below), whose sum is σ = 1316872151512. Its totient is φ = 1278140617512.

The previous prime is 1297506384467. The next prime is 1297506384529. The reversal of 1297506384511 is 1154836057921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1297506384511 - 2¹¹ = 1297506382463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297506384571) 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, 9682883400 + ... + 9682883533.

It is an arithmetic number, because the mean of its divisors is an integer number (329218037878).

It is a 1-persistent number, because it is pandigital, but 2⋅1297506384511 = 2595012769022 is not.

Almost surely, 2^{1297506384511} is an apocalyptic number.

1297506384511 is a deficient number, since it is larger than the sum of its proper divisors (19365767001).

1297506384511 is an equidigital number, since it uses as much as digits as its factorization.

1297506384511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19365767000.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 1297506384511 in words is "one trillion, two hundred ninety-seven billion, five hundred six million, three hundred eighty-four thousand, five hundred eleven".