1280567 has 2 divisors, whose sum is σ = 1280568. Its totient is φ = 1280566.

The previous prime is 1280561. The next prime is 1280597. The reversal of 1280567 is 7650821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280567 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280561) 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 as a sum of consecutive naturals, namely, 640283 + 640284.

It is an arithmetic number, because the mean of its divisors is an integer number (640284).

2^1280567 is an apocalyptic number.

1280567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280567 is an equidigital number, since it uses as much as digits as its factorization.

1280567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1280567 is about 1131.6214031203. The cubic root of 1280567 is about 108.5927343262.

The spelling of 1280567 in words is "one million, two hundred eighty thousand, five hundred sixty-seven".