1279667 has 2 divisors, whose sum is σ = 1279668. Its totient is φ = 1279666.

The previous prime is 1279661. The next prime is 1279673. The reversal of 1279667 is 7669721.

It is a balanced prime because it is at equal distance from previous prime (1279661) and next prime (1279673).

It is an emirp because it is prime and its reverse (7669721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1279667 - 2¹⁶ = 1214131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1279667.

It is not a weakly prime, because it can be changed into another prime (1279661) 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, 639833 + 639834.

It is an arithmetic number, because the mean of its divisors is an integer number (639834).

2^1279667 is an apocalyptic number.

1279667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279667 is an equidigital number, since it uses as much as digits as its factorization.

1279667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 38.

The square root of 1279667 is about 1131.2236737268. The cubic root of 1279667 is about 108.5672882111.

The spelling of 1279667 in words is "one million, two hundred seventy-nine thousand, six hundred sixty-seven".