123078642 has 32 divisors (see below), whose sum is σ = 255467520. Its totient is φ = 39501840.

The previous prime is 123078611. The next prime is 123078643. The reversal of 123078642 is 246870321.

It is not an unprimeable number, because it can be changed into a prime (123078643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14959 + ... + 21677.

It is an arithmetic number, because the mean of its divisors is an integer number (7983360).

Almost surely, 2^123078642 is an apocalyptic number.

123078642 is an abundant number, since it is smaller than the sum of its proper divisors (132388878).

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

123078642 is a wasteful number, since it uses less digits than its factorization.

123078642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 123078642 is about 11094.0813950502. The cubic root of 123078642 is about 497.4249503383.

The spelling of 123078642 in words is "one hundred twenty-three million, seventy-eight thousand, six hundred forty-two".