1126545921 has 16 divisors (see below), whose sum is σ = 1722795520. Its totient is φ = 726803280.

The previous prime is 1126545887. The next prime is 1126545923. The reversal of 1126545921 is 1295456211.

1126545921 is a `hidden beast` number, since 1 + 1 + 2 + 65 + 4 + 592 + 1 = 666.

It is not a de Polignac number, because 1126545921 - 2⁶ = 1126545857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1126545923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672130 + ... + 673803.

It is an arithmetic number, because the mean of its divisors is an integer number (107674720).

Almost surely, 2^1126545921 is an apocalyptic number.

It is an amenable number.

1126545921 is a deficient number, since it is larger than the sum of its proper divisors (596249599).

1126545921 is a wasteful number, since it uses less digits than its factorization.

1126545921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345973 (or 1345967 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1126545921 is about 33564.0569806452. The cubic root of 1126545921 is about 1040.5180853717.

The spelling of 1126545921 in words is "one billion, one hundred twenty-six million, five hundred forty-five thousand, nine hundred twenty-one".