12855278 has 4 divisors (see below), whose sum is σ = 19282920. Its totient is φ = 6427638.

The previous prime is 12855277. The next prime is 12855287. The reversal of 12855278 is 87255821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12855277) by changing a digit.

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 as a sum of consecutive naturals, namely, 3213818 + ... + 3213821.

It is an arithmetic number, because the mean of its divisors is an integer number (4820730).

Almost surely, 2^12855278 is an apocalyptic number.

12855278 is a deficient number, since it is larger than the sum of its proper divisors (6427642).

12855278 is an equidigital number, since it uses as much as digits as its factorization.

12855278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6427641.

The product of its digits is 44800, while the sum is 38.

The square root of 12855278 is about 3585.4257766687. The cubic root of 12855278 is about 234.2576726658.

The spelling of 12855278 in words is "twelve million, eight hundred fifty-five thousand, two hundred seventy-eight".