1287055 has 16 divisors (see below), whose sum is σ = 1926144. Its totient is φ = 802080.

The previous prime is 1287047. The next prime is 1287059. The reversal of 1287055 is 5507821.

It is not a de Polignac number, because 1287055 - 2³ = 1287047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287 + ... + 2056.

It is an arithmetic number, because the mean of its divisors is an integer number (120384).

2^1287055 is an apocalyptic number.

1287055 is a deficient number, since it is larger than the sum of its proper divisors (639089).

1287055 is a wasteful number, since it uses less digits than its factorization.

1287055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1287055 is about 1134.4844644154. The cubic root of 1287055 is about 108.7758207064.

The spelling of 1287055 in words is "one million, two hundred eighty-seven thousand, fifty-five".