1266884992 has 16 divisors (see below), whose sum is σ = 2523872700. Its totient is φ = 633442432.

The previous prime is 1266884989. The next prime is 1266885019. The reversal of 1266884992 is 2994886621.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948642 + ... + 4948897.

Almost surely, 2^1266884992 is an apocalyptic number.

It is an amenable number.

1266884992 is a deficient number, since it is larger than the sum of its proper divisors (1256987708).

1266884992 is an frugal number, since it uses more digits than its factorization.

1266884992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897553 (or 9897541 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 1266884992 is about 35593.3279140909. The cubic root of 1266884992 is about 1082.0460162903.

It can be divided in two parts, 1266884 and 992, that added together give a square (1267876 = 1126²).

The spelling of 1266884992 in words is "one billion, two hundred sixty-six million, eight hundred eighty-four thousand, nine hundred ninety-two".