1281167 has 2 divisors, whose sum is σ = 1281168. Its totient is φ = 1281166.

The previous prime is 1281157. The next prime is 1281187. The reversal of 1281167 is 7611821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281167 - 2¹² = 1277071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281157) 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, 640583 + 640584.

It is an arithmetic number, because the mean of its divisors is an integer number (640584).

2^1281167 is an apocalyptic number.

1281167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281167 is an equidigital number, since it uses as much as digits as its factorization.

1281167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 1281167 is about 1131.8864784067. The cubic root of 1281167 is about 108.6096917800.

Adding to 1281167 its reverse (7611821), we get a palindrome (8892988).

The spelling of 1281167 in words is "one million, two hundred eighty-one thousand, one hundred sixty-seven".