1287027055 has 16 divisors (see below), whose sum is σ = 1588505184. Its totient is φ = 1000321920.

The previous prime is 1287027043. The next prime is 1287027059. The reversal of 1287027055 is 5507207821.

It is not a de Polignac number, because 1287027055 - 2²¹ = 1284929903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287027059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130860 + ... + 140350.

It is an arithmetic number, because the mean of its divisors is an integer number (99281574).

Almost surely, 2^1287027055 is an apocalyptic number.

1287027055 is a deficient number, since it is larger than the sum of its proper divisors (301478129).

1287027055 is an equidigital number, since it uses as much as digits as its factorization.

1287027055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10266.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 1287027055 is about 35875.1593027822. The cubic root of 1287027055 is about 1087.7503344082.

The spelling of 1287027055 in words is "one billion, two hundred eighty-seven million, twenty-seven thousand, fifty-five".