1287551880297 has 6 divisors (see below), whose sum is σ = 1859797160442. Its totient is φ = 858367920192.

The previous prime is 1287551880289. The next prime is 1287551880299. The reversal of 1287551880297 is 7920881557821.

1287551880297 is a `hidden beast` number, since 1 + 28 + 7 + 5 + 518 + 8 + 0 + 2 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1144876460121 + 142675420176 = 1069989^2 + 377724^2 .

It is not a de Polignac number, because 1287551880297 - 2³ = 1287551880289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1287551880299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71530660008 + ... + 71530660025.

It is an arithmetic number, because the mean of its divisors is an integer number (309966193407).

Almost surely, 2^{1287551880297} is an apocalyptic number.

It is an amenable number.

1287551880297 is a deficient number, since it is larger than the sum of its proper divisors (572245280145).

1287551880297 is a wasteful number, since it uses less digits than its factorization.

1287551880297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143061320039 (or 143061320036 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 63.

The spelling of 1287551880297 in words is "one trillion, two hundred eighty-seven billion, five hundred fifty-one million, eight hundred eighty thousand, two hundred ninety-seven".