1280043 has 10 divisors (see below), whose sum is σ = 1912284. Its totient is φ = 853308.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280043 is 3400821.

It is a happy number.

It is not a de Polignac number, because 1280043 - 2⁸ = 1279787 is a prime.

1280043 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1279998 and 1280025.

It is not an unprimeable number, because it can be changed into a prime (1280023) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7821 + ... + 7982.

2^1280043 is an apocalyptic number.

1280043 is a deficient number, since it is larger than the sum of its proper divisors (632241).

1280043 is an equidigital number, since it uses as much as digits as its factorization.

1280043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15815 (or 15806 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1280043 is about 1131.3898532336. The cubic root of 1280043 is about 108.5779204831.

Adding to 1280043 its reverse (3400821), we get a palindrome (4680864).

The spelling of 1280043 in words is "one million, two hundred eighty thousand, forty-three".