1266123115 has 8 divisors (see below), whose sum is σ = 1519544880. Its totient is φ = 1012767072.

The previous prime is 1266123109. The next prime is 1266123149. The reversal of 1266123115 is 5113216621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266123115 - 2³ = 1266123107 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51481 + ... + 71989.

It is an arithmetic number, because the mean of its divisors is an integer number (189943110).

Almost surely, 2^1266123115 is an apocalyptic number.

1266123115 is a deficient number, since it is larger than the sum of its proper divisors (253421765).

1266123115 is a wasteful number, since it uses less digits than its factorization.

1266123115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32861.

The product of its digits is 2160, while the sum is 28.

The square root of 1266123115 is about 35582.6237790301. The cubic root of 1266123115 is about 1081.8290665043.

Adding to 1266123115 its reverse (5113216621), we get a palindrome (6379339736).

The spelling of 1266123115 in words is "one billion, two hundred sixty-six million, one hundred twenty-three thousand, one hundred fifteen".