12122678 has 4 divisors (see below), whose sum is σ = 18184020. Its totient is φ = 6061338.

The previous prime is 12122659. The next prime is 12122723. The reversal of 12122678 is 87622121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87622121 = 113 ⋅775417.

It is a self number, because there is not a number n which added to its sum of digits gives 12122678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030668 + ... + 3030671.

It is an arithmetic number, because the mean of its divisors is an integer number (4546005).

Almost surely, 2^12122678 is an apocalyptic number.

12122678 is a deficient number, since it is larger than the sum of its proper divisors (6061342).

12122678 is an equidigital number, since it uses as much as digits as its factorization.

12122678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061341.

The product of its digits is 2688, while the sum is 29.

The square root of 12122678 is about 3481.7636335627. The cubic root of 12122678 is about 229.7203785257.

Adding to 12122678 its reverse (87622121), we get a palindrome (99744799).

The spelling of 12122678 in words is "twelve million, one hundred twenty-two thousand, six hundred seventy-eight".