1266525128 has 16 divisors (see below), whose sum is σ = 2590619760. Its totient is φ = 575693200.

The previous prime is 1266525089. The next prime is 1266525191. The reversal of 1266525128 is 8215256621.

It is a junction number, because it is equal to n+sod(n) for n = 1266525091 and 1266525100.

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 3 ways as a sum of consecutive naturals, for example, 7196078 + ... + 7196253.

It is an arithmetic number, because the mean of its divisors is an integer number (161913735).

Almost surely, 2^1266525128 is an apocalyptic number.

It is an amenable number.

1266525128 is an abundant number, since it is smaller than the sum of its proper divisors (1324094632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266525128 is a wasteful number, since it uses less digits than its factorization.

1266525128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14392348 (or 14392344 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 1266525128 is about 35588.2723379486. The cubic root of 1266525128 is about 1081.9435533504.

The spelling of 1266525128 in words is "one billion, two hundred sixty-six million, five hundred twenty-five thousand, one hundred twenty-eight".