123078 has 16 divisors (see below), whose sum is σ = 250416. Its totient is φ = 40320.

The previous prime is 123077. The next prime is 123083. The reversal of 123078 is 870321.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298 + ... + 578.

It is an arithmetic number, because the mean of its divisors is an integer number (15651).

2¹²³⁰⁷⁸ is an apocalyptic number.

123078 is an abundant number, since it is smaller than the sum of its proper divisors (127338).

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

123078 is a wasteful number, since it uses less digits than its factorization.

123078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 123078 is about 350.8247425710. The cubic root of 123078 is about 49.7424085451.

Adding to 123078 its reverse (870321), we get a palindrome (993399).

The spelling of 123078 in words is "one hundred twenty-three thousand, seventy-eight".