123515272 has 16 divisors (see below), whose sum is σ = 232605900. Its totient is φ = 61487040.

The previous prime is 123515239. The next prime is 123515297. The reversal of 123515272 is 272515321.

It can be written as a sum of positive squares in 2 ways, for example, as 111640356 + 11874916 = 10566^2 + 3446^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123515272.

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 in 3 ways as a sum of consecutive naturals, for example, 31879 + ... + 35542.

Almost surely, 2^123515272 is an apocalyptic number.

It is an amenable number.

123515272 is a deficient number, since it is larger than the sum of its proper divisors (109090628).

123515272 is a wasteful number, since it uses less digits than its factorization.

123515272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67656 (or 67652 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 123515272 is about 11113.7424839700. The cubic root of 123515272 is about 498.0124726047.

The spelling of 123515272 in words is "one hundred twenty-three million, five hundred fifteen thousand, two hundred seventy-two".