1266123116 has 6 divisors (see below), whose sum is σ = 2215715460. Its totient is φ = 633061556.

The previous prime is 1266123109. The next prime is 1266123149. The reversal of 1266123116 is 6113216621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158265386 + ... + 158265393.

It is an arithmetic number, because the mean of its divisors is an integer number (369285910).

Almost surely, 2^1266123116 is an apocalyptic number.

It is an amenable number.

1266123116 is a deficient number, since it is larger than the sum of its proper divisors (949592344).

1266123116 is a wasteful number, since it uses less digits than its factorization.

1266123116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316530783 (or 316530781 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 1266123116 is about 35582.6237930819. The cubic root of 1266123116 is about 1081.8290667891.

Adding to 1266123116 its reverse (6113216621), we get a palindrome (7379339737).

The spelling of 1266123116 in words is "one billion, two hundred sixty-six million, one hundred twenty-three thousand, one hundred sixteen".