2785748121 has 12 divisors (see below), whose sum is σ = 4333386148. Its totient is φ = 1714306464.

The previous prime is 2785748111. The next prime is 2785748191. The reversal of 2785748121 is 1218475872.

2785748121 is a `hidden beast` number, since 2 + 78 + 574 + 8 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 241958025 + 2543790096 = 15555^2 + 50436^2 .

It is not a de Polignac number, because 2785748121 - 2⁵ = 2785748089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2785748101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11904790 + ... + 11905023.

Almost surely, 2^2785748121 is an apocalyptic number.

It is an amenable number.

2785748121 is a deficient number, since it is larger than the sum of its proper divisors (1547638027).

2785748121 is a wasteful number, since it uses less digits than its factorization.

2785748121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809832 (or 23809829 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 2785748121 is about 52780.1868223295. The cubic root of 2785748121 is about 1407.0643145225.

The spelling of 2785748121 in words is "two billion, seven hundred eighty-five million, seven hundred forty-eight thousand, one hundred twenty-one".