1266171017 has 4 divisors (see below), whose sum is σ = 1266711936. Its totient is φ = 1265630100.

The previous prime is 1266171013. The next prime is 1266171097. The reversal of 1266171017 is 7101716621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1266171017 - 2² = 1266171013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266171013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266933 + ... + 271634.

It is an arithmetic number, because the mean of its divisors is an integer number (316677984).

Almost surely, 2^1266171017 is an apocalyptic number.

It is an amenable number.

1266171017 is a deficient number, since it is larger than the sum of its proper divisors (540919).

1266171017 is an equidigital number, since it uses as much as digits as its factorization.

1266171017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540918.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 1266171017 is about 35583.2968821047. The cubic root of 1266171017 is about 1081.8427094963.

Adding to 1266171017 its reverse (7101716621), we get a palindrome (8367887638).

The spelling of 1266171017 in words is "one billion, two hundred sixty-six million, one hundred seventy-one thousand, seventeen".