1020255 has 16 divisors (see below), whose sum is σ = 1728864. Its totient is φ = 512000.

The previous prime is 1020247. The next prime is 1020259. The reversal of 1020255 is 5520201.

It is not a de Polignac number, because 1020255 - 2³ = 1020247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020259) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1746 + ... + 2255.

It is an arithmetic number, because the mean of its divisors is an integer number (108054).

2^1020255 is an apocalyptic number.

1020255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020255 is a deficient number, since it is larger than the sum of its proper divisors (708609).

1020255 is a wasteful number, since it uses less digits than its factorization.

1020255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 1020255 is about 1010.0767297587. The cubic root of 1020255 is about 100.6706587796.

Adding to 1020255 its reverse (5520201), we get a palindrome (6540456).

It can be divided in two parts, 1020 and 255, that multiplied together give a square (260100 = 510²).

The spelling of 1020255 in words is "one million, twenty thousand, two hundred fifty-five".