1011280 has 20 divisors (see below), whose sum is σ = 2351412. Its totient is φ = 404480.

The previous prime is 1011277. The next prime is 1011281. The reversal of 1011280 is 821101.

It can be written as a sum of positive squares in 2 ways, for example, as 104976 + 906304 = 324^2 + 952^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1011280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011281) 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 3 ways as a sum of consecutive naturals, for example, 6241 + ... + 6400.

2^1011280 is an apocalyptic number.

1011280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011280 is an abundant number, since it is smaller than the sum of its proper divisors (1340132).

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

1011280 is a wasteful number, since it uses less digits than its factorization.

1011280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12654 (or 12648 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1011280 is about 1005.6241842756. The cubic root of 1011280 is about 100.3745950335.

Adding to 1011280 its reverse (821101), we get a palindrome (1832381).

The spelling of 1011280 in words is "one million, eleven thousand, two hundred eighty".