1280543 has 12 divisors (see below), whose sum is σ = 1484280. Its totient is φ = 1100880.

The previous prime is 1280537. The next prime is 1280549. The reversal of 1280543 is 3450821.

It is an interprime number because it is at equal distance from previous prime (1280537) and next prime (1280549).

It is not a de Polignac number, because 1280543 - 2¹⁰ = 1279519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280549) 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 11 ways as a sum of consecutive naturals, for example, 2021 + ... + 2577.

It is an arithmetic number, because the mean of its divisors is an integer number (123690).

2^1280543 is an apocalyptic number.

1280543 is a deficient number, since it is larger than the sum of its proper divisors (203737).

1280543 is a wasteful number, since it uses less digits than its factorization.

1280543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1280543 is about 1131.6107988173. The cubic root of 1280543 is about 108.5920559179.

The spelling of 1280543 in words is "one million, two hundred eighty thousand, five hundred forty-three".