12278255 has 8 divisors (see below), whose sum is σ = 16073424. Its totient is φ = 8929600.

The previous prime is 12278249. The next prime is 12278257. The reversal of 12278255 is 55287221.

It is a happy number.

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

It is not a de Polignac number, because 12278255 - 2¹² = 12274159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111566 + ... + 111675.

It is an arithmetic number, because the mean of its divisors is an integer number (2009178).

Almost surely, 2^12278255 is an apocalyptic number.

12278255 is a deficient number, since it is larger than the sum of its proper divisors (3795169).

12278255 is a wasteful number, since it uses less digits than its factorization.

12278255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223257.

The product of its digits is 11200, while the sum is 32.

The square root of 12278255 is about 3504.0341037153. The cubic root of 12278255 is about 230.6989137185.

The spelling of 12278255 in words is "twelve million, two hundred seventy-eight thousand, two hundred fifty-five".