1287795220304 has 10 divisors (see below), whose sum is σ = 2495103239370. Its totient is φ = 643897610144.

The previous prime is 1287795220303. The next prime is 1287795220367. The reversal of 1287795220304 is 4030225977821.

It can be written as a sum of positive squares in only one way, i.e., 1013952330304 + 273842890000 = 1006952^2 + 523300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287795220303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40243600619 + ... + 40243600650.

It is an arithmetic number, because the mean of its divisors is an integer number (249510323937).

Almost surely, 2^{1287795220304} is an apocalyptic number.

It is an amenable number.

1287795220304 is a deficient number, since it is larger than the sum of its proper divisors (1207308019066).

1287795220304 is an equidigital number, since it uses as much as digits as its factorization.

1287795220304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80487201277 (or 80487201271 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 1287795220304 in words is "one trillion, two hundred eighty-seven billion, seven hundred ninety-five million, two hundred twenty thousand, three hundred four".