12278263 has 16 divisors (see below), whose sum is σ = 13268992. Its totient is φ = 11340000.

The previous prime is 12278261. The next prime is 12278269. The reversal of 12278263 is 36287221.

It is a cyclic number.

It is not a de Polignac number, because 12278263 - 2¹ = 12278261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278261) 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 15 ways as a sum of consecutive naturals, for example, 81238 + ... + 81388.

It is an arithmetic number, because the mean of its divisors is an integer number (829312).

Almost surely, 2^12278263 is an apocalyptic number.

12278263 is a deficient number, since it is larger than the sum of its proper divisors (990729).

12278263 is a wasteful number, since it uses less digits than its factorization.

12278263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 8064, while the sum is 31.

The square root of 12278263 is about 3504.0352452565. The cubic root of 12278263 is about 230.6989638231.

The spelling of 12278263 in words is "twelve million, two hundred seventy-eight thousand, two hundred sixty-three".