1283280 has 40 divisors (see below), whose sum is σ = 3978912. Its totient is φ = 342144.

The previous prime is 1283237. The next prime is 1283297. The reversal of 1283280 is 823821.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1283280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434 + ... + 2913.

2^1283280 is an apocalyptic number.

1283280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1283280 is an abundant number, since it is smaller than the sum of its proper divisors (2695632).

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

1283280 is a wasteful number, since it uses less digits than its factorization.

1283280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363 (or 5357 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1283280 is about 1132.8194913577. The cubic root of 1283280 is about 108.6693681606.

The spelling of 1283280 in words is "one million, two hundred eighty-three thousand, two hundred eighty".