12278851 has 4 divisors (see below), whose sum is σ = 13223392. Its totient is φ = 11334312.

The previous prime is 12278837. The next prime is 12278869. The reversal of 12278851 is 15887221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12278801) 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 in 3 ways as a sum of consecutive naturals, for example, 472251 + ... + 472276.

It is an arithmetic number, because the mean of its divisors is an integer number (3305848).

Almost surely, 2^12278851 is an apocalyptic number.

12278851 is a deficient number, since it is larger than the sum of its proper divisors (944541).

12278851 is an equidigital number, since it uses as much as digits as its factorization.

12278851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944540.

The product of its digits is 8960, while the sum is 34.

The square root of 12278851 is about 3504.1191475177. The cubic root of 12278851 is about 230.7026464511.

The spelling of 12278851 in words is "twelve million, two hundred seventy-eight thousand, eight hundred fifty-one".