12143278 has 12 divisors (see below), whose sum is σ = 21188952. Its totient is φ = 5204220.

The previous prime is 12143251. The next prime is 12143291. The reversal of 12143278 is 87234121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61858 + ... + 62053.

It is an arithmetic number, because the mean of its divisors is an integer number (1765746).

Almost surely, 2^12143278 is an apocalyptic number.

12143278 is a deficient number, since it is larger than the sum of its proper divisors (9045674).

12143278 is a wasteful number, since it uses less digits than its factorization.

12143278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123927 (or 123920 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 12143278 is about 3484.7206487752. The cubic root of 12143278 is about 229.8504257489.

Adding to 12143278 its reverse (87234121), we get a palindrome (99377399).

It can be divided in two parts, 12143 and 278, that added together give a palindrome (12421).

The spelling of 12143278 in words is "twelve million, one hundred forty-three thousand, two hundred seventy-eight".