1028715 has 8 divisors (see below), whose sum is σ = 1645968. Its totient is φ = 548640.

The previous prime is 1028683. The next prime is 1028737. The reversal of 1028715 is 5178201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1028715 - 2⁵ = 1028683 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34276 + ... + 34305.

It is an arithmetic number, because the mean of its divisors is an integer number (205746).

2^1028715 is an apocalyptic number.

1028715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1028715 is a deficient number, since it is larger than the sum of its proper divisors (617253).

1028715 is an equidigital number, since it uses as much as digits as its factorization.

1028715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68589.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1028715 is about 1014.2558848732. The cubic root of 1028715 is about 100.9481484004.

The spelling of 1028715 in words is "one million, twenty-eight thousand, seven hundred fifteen".