1125173865 has 16 divisors (see below), whose sum is σ = 1844188416. Its totient is φ = 585456000.

The previous prime is 1125173831. The next prime is 1125173873. The reversal of 1125173865 is 5683715211.

It is not a de Polignac number, because 1125173865 - 2⁹ = 1125173353 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914161 + ... + 915390.

It is an arithmetic number, because the mean of its divisors is an integer number (115261776).

Almost surely, 2^1125173865 is an apocalyptic number.

1125173865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1125173865 is a deficient number, since it is larger than the sum of its proper divisors (719014551).

1125173865 is a wasteful number, since it uses less digits than its factorization.

1125173865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829600.

The product of its digits is 50400, while the sum is 39.

The square root of 1125173865 is about 33543.6113887578. The cubic root of 1125173865 is about 1040.0954871029.

The spelling of 1125173865 in words is "one billion, one hundred twenty-five million, one hundred seventy-three thousand, eight hundred sixty-five".