1266869 has 2 divisors, whose sum is σ = 1266870. Its totient is φ = 1266868.

The previous prime is 1266851. The next prime is 1266883. The reversal of 1266869 is 9686621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1129969 + 136900 = 1063^2 + 370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266869 is a prime.

It is a super-2 number, since 2×1266869² = 3209914126322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266899) 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, 633434 + 633435.

It is an arithmetic number, because the mean of its divisors is an integer number (633435).

2^1266869 is an apocalyptic number.

It is an amenable number.

1266869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266869 is an equidigital number, since it uses as much as digits as its factorization.

1266869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 1266869 is about 1125.5527530951. The cubic root of 1266869 is about 108.2041463351.

The spelling of 1266869 in words is "one million, two hundred sixty-six thousand, eight hundred sixty-nine".