123278 has 8 divisors (see below), whose sum is σ = 188568. Its totient is φ = 60424.

The previous prime is 123269. The next prime is 123289. The reversal of 123278 is 872321.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (23571).

2¹²³²⁷⁸ is an apocalyptic number.

123278 is a deficient number, since it is larger than the sum of its proper divisors (65290).

123278 is a wasteful number, since it uses less digits than its factorization.

123278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218.

The product of its digits is 672, while the sum is 23.

The square root of 123278 is about 351.1096694766. The cubic root of 123278 is about 49.7693375328.

Adding to 123278 its reverse (872321), we get a palindrome (995599).

The spelling of 123278 in words is "one hundred twenty-three thousand, two hundred seventy-eight".