1028987 has 4 divisors (see below), whose sum is σ = 1033056. Its totient is φ = 1024920.

The previous prime is 1028981. The next prime is 1028999. The reversal of 1028987 is 7898201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7898201 = 1307 ⋅6043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628 + ... + 2169.

It is an arithmetic number, because the mean of its divisors is an integer number (258264).

2^1028987 is an apocalyptic number.

1028987 is a deficient number, since it is larger than the sum of its proper divisors (4069).

1028987 is an equidigital number, since it uses as much as digits as its factorization.

1028987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1028987 is about 1014.3899644614. The cubic root of 1028987 is about 100.9570447668.

The spelling of 1028987 in words is "one million, twenty-eight thousand, nine hundred eighty-seven".