1266995892 has 24 divisors (see below), whose sum is σ = 2959566400. Its totient is φ = 421868736.

The previous prime is 1266995887. The next prime is 1266995911. The reversal of 1266995892 is 2985996621.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46417 + ... + 68472.

Almost surely, 2^1266995892 is an apocalyptic number.

1266995892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266995892 is an abundant number, since it is smaller than the sum of its proper divisors (1692570508).

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

1266995892 is a wasteful number, since it uses less digits than its factorization.

1266995892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115815 (or 115813 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 57.

The square root of 1266995892 is about 35594.8857562431. The cubic root of 1266995892 is about 1082.0775885858.

The spelling of 1266995892 in words is "one billion, two hundred sixty-six million, nine hundred ninety-five thousand, eight hundred ninety-two".