1284987 has 16 divisors (see below), whose sum is σ = 1951488. Its totient is φ = 744480.

The previous prime is 1284977. The next prime is 1284991. The reversal of 1284987 is 7894821.

It is not a de Polignac number, because 1284987 - 2⁴ = 1284971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1284917) 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, 88 + ... + 1605.

It is an arithmetic number, because the mean of its divisors is an integer number (121968).

2^1284987 is an apocalyptic number.

1284987 is a deficient number, since it is larger than the sum of its proper divisors (666501).

1284987 is a wasteful number, since it uses less digits than its factorization.

1284987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730.

The product of its digits is 32256, while the sum is 39.

The square root of 1284987 is about 1133.5726708068. The cubic root of 1284987 is about 108.7175302721.

It can be divided in two parts, 128 and 4987, that added together give a palindrome (5115).

The spelling of 1284987 in words is "one million, two hundred eighty-four thousand, nine hundred eighty-seven".