1280343 has 8 divisors (see below), whose sum is σ = 1731456. Its totient is φ = 841400.

The previous prime is 1280333. The next prime is 1280371. The reversal of 1280343 is 3430821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280343 - 2¹⁰ = 1279319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280333) 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 7 ways as a sum of consecutive naturals, for example, 2793 + ... + 3218.

It is an arithmetic number, because the mean of its divisors is an integer number (216432).

2^1280343 is an apocalyptic number.

1280343 is a deficient number, since it is larger than the sum of its proper divisors (451113).

1280343 is an equidigital number, since it uses as much as digits as its factorization.

1280343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6085.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1280343 is about 1131.5224257610. The cubic root of 1280343 is about 108.5864021856.

The spelling of 1280343 in words is "one million, two hundred eighty thousand, three hundred forty-three".