1028771 has 4 divisors (see below), whose sum is σ = 1033032. Its totient is φ = 1024512.

The previous prime is 1028761. The next prime is 1028773. The reversal of 1028771 is 1778201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1778201 = 59 ⋅30139.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028771 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028771.

It is not an unprimeable number, because it can be changed into a prime (1028773) 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, 1745 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (258258).

2^1028771 is an apocalyptic number.

1028771 is a deficient number, since it is larger than the sum of its proper divisors (4261).

1028771 is an equidigital number, since it uses as much as digits as its factorization.

1028771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1028771 is about 1014.2834909432. The cubic root of 1028771 is about 100.9499801334.

The spelling of 1028771 in words is "one million, twenty-eight thousand, seven hundred seventy-one".