123015992 has 16 divisors (see below), whose sum is σ = 251623800. Its totient is φ = 55916320.

The previous prime is 123015979. The next prime is 123016001. The reversal of 123015992 is 299510321.

It is a congruent number.

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, 698867 + ... + 699042.

Almost surely, 2^123015992 is an apocalyptic number.

It is an amenable number.

123015992 is an abundant number, since it is smaller than the sum of its proper divisors (128607808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123015992 is a wasteful number, since it uses less digits than its factorization.

123015992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397926 (or 1397922 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 123015992 is about 11091.2574580162. The cubic root of 123015992 is about 497.3405355776.

The spelling of 123015992 in words is "one hundred twenty-three million, fifteen thousand, nine hundred ninety-two".