1280743 has 2 divisors, whose sum is σ = 1280744. Its totient is φ = 1280742.

The previous prime is 1280737. The next prime is 1280759. The reversal of 1280743 is 3470821.

It is a weak prime.

It is an emirp because it is prime and its reverse (3470821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1280743 - 2⁹ = 1280231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640371 + 640372.

It is an arithmetic number, because the mean of its divisors is an integer number (640372).

2^1280743 is an apocalyptic number.

1280743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280743 is an equidigital number, since it uses as much as digits as its factorization.

1280743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1280743 is about 1131.6991649727. The cubic root of 1280743 is about 108.5977090615.

The spelling of 1280743 in words is "one million, two hundred eighty thousand, seven hundred forty-three".