1020285 has 48 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 449280.

The previous prime is 1020269. The next prime is 1020293. The reversal of 1020285 is 5820201.

It is not a de Polignac number, because 1020285 - 2⁴ = 1020269 is a prime.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 12876 + ... + 12954.

It is an arithmetic number, because the mean of its divisors is an integer number (43680).

2^1020285 is an apocalyptic number.

1020285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020285 is an abundant number, since it is smaller than the sum of its proper divisors (1076355).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020285 is a wasteful number, since it uses less digits than its factorization.

1020285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1020285 is about 1010.0915800065. The cubic root of 1020285 is about 100.6716454905.

Adding to 1020285 its reverse (5820201), we get a palindrome (6840486).

The spelling of 1020285 in words is "one million, twenty thousand, two hundred eighty-five".