1266091 has 2 divisors, whose sum is σ = 1266092. Its totient is φ = 1266090.

The previous prime is 1266079. The next prime is 1266101. The reversal of 1266091 is 1906621.

It is a strong prime.

It is an emirp because it is prime and its reverse (1906621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266091 - 2⁵ = 1266059 is a prime.

1266091 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1266191) 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, 633045 + 633046.

It is an arithmetic number, because the mean of its divisors is an integer number (633046).

2^1266091 is an apocalyptic number.

1266091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266091 is an equidigital number, since it uses as much as digits as its factorization.

1266091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1266091 is about 1125.2070920502. The cubic root of 1266091 is about 108.1819919623.

The spelling of 1266091 in words is "one million, two hundred sixty-six thousand, ninety-one".