1280267 has 2 divisors, whose sum is σ = 1280268. Its totient is φ = 1280266.

The previous prime is 1280231. The next prime is 1280281. The reversal of 1280267 is 7620821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1280267 - 2¹⁸ = 1018123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1280297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640133 + 640134.

It is an arithmetic number, because the mean of its divisors is an integer number (640134).

2^1280267 is an apocalyptic number.

1280267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280267 is an equidigital number, since it uses as much as digits as its factorization.

1280267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1280267 is about 1131.4888421898. The cubic root of 1280267 is about 108.5842536129.

The spelling of 1280267 in words is "one million, two hundred eighty thousand, two hundred sixty-seven".