123123872 has 12 divisors (see below), whose sum is σ = 242400186. Its totient is φ = 61561920.

The previous prime is 123123863. The next prime is 123123881. The reversal of 123123872 is 278321321.

It is an interprime number because it is at equal distance from previous prime (123123863) and next prime (123123881).

It can be written as a sum of positive squares in only one way, i.e., 114147856 + 8976016 = 10684^2 + 2996^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1923779 + ... + 1923842.

Almost surely, 2^123123872 is an apocalyptic number.

It is an amenable number.

123123872 is a deficient number, since it is larger than the sum of its proper divisors (119276314).

123123872 is an equidigital number, since it uses as much as digits as its factorization.

123123872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847631 (or 3847623 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 123123872 is about 11096.1196821231. The cubic root of 123123872 is about 497.4858755449.

The spelling of 123123872 in words is "one hundred twenty-three million, one hundred twenty-three thousand, eight hundred seventy-two".