1028745 has 12 divisors (see below), whose sum is σ = 1783236. Its totient is φ = 548640.

The previous prime is 1028737. The next prime is 1028747. The reversal of 1028745 is 5478201.

It can be written as a sum of positive squares in 2 ways, for example, as 710649 + 318096 = 843^2 + 564^2 .

It is not a de Polignac number, because 1028745 - 2³ = 1028737 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1028747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11386 + ... + 11475.

It is an arithmetic number, because the mean of its divisors is an integer number (148603).

2^1028745 is an apocalyptic number.

1028745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1028745 is a deficient number, since it is larger than the sum of its proper divisors (754491).

1028745 is a wasteful number, since it uses less digits than its factorization.

1028745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22872 (or 22869 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1028745 is about 1014.2706739328. The cubic root of 1028745 is about 100.9491296942.

The spelling of 1028745 in words is "one million, twenty-eight thousand, seven hundred forty-five".