1287144428573 has 8 divisors (see below), whose sum is σ = 1288361448792. Its totient is φ = 1285927695936.

The previous prime is 1287144428561. The next prime is 1287144428579. The reversal of 1287144428573 is 3758244417821.

It can be written as a sum of positive squares in 4 ways, for example, as 229903947289 + 1057240481284 = 479483^2 + 1028222^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1287144428573 - 2¹² = 1287144424477 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 (1287144428579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9478511 + ... + 9613347.

It is an arithmetic number, because the mean of its divisors is an integer number (161045181099).

Almost surely, 2^{1287144428573} is an apocalyptic number.

It is an amenable number.

1287144428573 is a deficient number, since it is larger than the sum of its proper divisors (1217020219).

1287144428573 is a wasteful number, since it uses less digits than its factorization.

1287144428573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143791.

The product of its digits is 12042240, while the sum is 56.

The spelling of 1287144428573 in words is "one trillion, two hundred eighty-seven billion, one hundred forty-four million, four hundred twenty-eight thousand, five hundred seventy-three".