1266132311 has 4 divisors (see below), whose sum is σ = 1266256824. Its totient is φ = 1266007800.

The previous prime is 1266132277. The next prime is 1266132323. The reversal of 1266132311 is 1132316621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1266132311 - 2⁶ = 1266132247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266132331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45500 + ... + 67841.

It is an arithmetic number, because the mean of its divisors is an integer number (316564206).

Almost surely, 2^1266132311 is an apocalyptic number.

1266132311 is a deficient number, since it is larger than the sum of its proper divisors (124513).

1266132311 is a wasteful number, since it uses less digits than its factorization.

1266132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124512.

The product of its digits is 1296, while the sum is 26.

The square root of 1266132311 is about 35582.7529991708. The cubic root of 1266132311 is about 1081.8316856482.

Adding to 1266132311 its reverse (1132316621), we get a palindrome (2398448932).

The spelling of 1266132311 in words is "one billion, two hundred sixty-six million, one hundred thirty-two thousand, three hundred eleven".