999271125 has 96 divisors (see below), whose sum is σ = 1887256800. Its totient is φ = 508032000.

The previous prime is 999271121. The next prime is 999271153. The reversal of 999271125 is 521172999.

It can be written as a sum of positive squares in 16 ways, for example, as 509224356 + 490046769 = 22566^2 + 22137^2 .

It is not a de Polignac number, because 999271125 - 2² = 999271121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999271121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3555985 + ... + 3556265.

It is an arithmetic number, because the mean of its divisors is an integer number (19658925).

Almost surely, 2^999271125 is an apocalyptic number.

It is an amenable number.

999271125 is a deficient number, since it is larger than the sum of its proper divisors (887985675).

999271125 is a wasteful number, since it uses less digits than its factorization.

999271125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 427 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 999271125 is about 31611.2499752857. The cubic root of 999271125 is about 999.7569826140.

The spelling of 999271125 in words is "nine hundred ninety-nine million, two hundred seventy-one thousand, one hundred twenty-five".