123015078 has 32 divisors (see below), whose sum is σ = 274821120. Its totient is φ = 40786920.

The previous prime is 123015031. The next prime is 123015083. The reversal of 123015078 is 870510321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent 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, 4351 + ... + 16277.

It is an arithmetic number, because the mean of its divisors is an integer number (8588160).

Almost surely, 2^123015078 is an apocalyptic number.

123015078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123015078 is an abundant number, since it is smaller than the sum of its proper divisors (151806042).

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

123015078 is a wasteful number, since it uses less digits than its factorization.

123015078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12129 (or 12123 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 123015078 is about 11091.2162543158. The cubic root of 123015078 is about 497.3393038397.

Adding to 123015078 its reverse (870510321), we get a palindrome (993525399).

The spelling of 123015078 in words is "one hundred twenty-three million, fifteen thousand, seventy-eight".