1266001101 has 24 divisors (see below), whose sum is σ = 1954026360. Its totient is φ = 787055616.

The previous prime is 1266001049. The next prime is 1266001111. The reversal of 1266001101 is 1011006621.

1266001101 is a `hidden beast` number, since 1 + 2 + 660 + 0 + 1 + 1 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 632472201 + 633528900 = 25149^2 + 25170^2 .

It is not a de Polignac number, because 1266001101 - 2⁷ = 1266000973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266001111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21280 + ... + 54633.

It is an arithmetic number, because the mean of its divisors is an integer number (81417765).

Almost surely, 2^1266001101 is an apocalyptic number.

It is an amenable number.

1266001101 is a deficient number, since it is larger than the sum of its proper divisors (688025259).

1266001101 is a wasteful number, since it uses less digits than its factorization.

1266001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76045 (or 76042 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1266001101 is about 35580.9092210978. The cubic root of 1266001101 is about 1081.7943140829.

Adding to 1266001101 its reverse (1011006621), we get a palindrome (2277007722).

The spelling of 1266001101 in words is "one billion, two hundred sixty-six million, one thousand, one hundred one".