1020280 has 32 divisors (see below), whose sum is σ = 2397600. Its totient is φ = 390016.

The previous prime is 1020269. The next prime is 1020293. The reversal of 1020280 is 820201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020280.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 366 + ... + 1474.

It is an arithmetic number, because the mean of its divisors is an integer number (74925).

2^1020280 is an apocalyptic number.

1020280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198800).

1020280 is an abundant number, since it is smaller than the sum of its proper divisors (1377320).

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

1020280 is a wasteful number, since it uses less digits than its factorization.

1020280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1020280 is about 1010.0891049803. The cubic root of 1020280 is about 100.6714810401.

Adding to 1020280 its reverse (820201), we get a palindrome (1840481).

The spelling of 1020280 in words is "one million, twenty thousand, two hundred eighty".