1280803 has 2 divisors, whose sum is σ = 1280804. Its totient is φ = 1280802.

The previous prime is 1280791. The next prime is 1280821. The reversal of 1280803 is 3080821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1280803 - 2⁹ = 1280291 is a prime.

It is an Ulam number.

1280803 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1280833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640401 + 640402.

It is an arithmetic number, because the mean of its divisors is an integer number (640402).

2^1280803 is an apocalyptic number.

1280803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280803 is an equidigital number, since it uses as much as digits as its factorization.

1280803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1280803 is about 1131.7256734739. The cubic root of 1280803 is about 108.5994048899.

The spelling of 1280803 in words is "one million, two hundred eighty thousand, eight hundred three".