12278197 has 4 divisors (see below), whose sum is σ = 12323776. Its totient is φ = 12232620.

The previous prime is 12278183. The next prime is 12278209. The reversal of 12278197 is 79187221.

12278197 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278197 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 (12278137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22383 + ... + 22924.

It is an arithmetic number, because the mean of its divisors is an integer number (3080944).

Almost surely, 2^12278197 is an apocalyptic number.

It is an amenable number.

12278197 is a deficient number, since it is larger than the sum of its proper divisors (45579).

12278197 is an equidigital number, since it uses as much as digits as its factorization.

12278197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45578.

The product of its digits is 14112, while the sum is 37.

The square root of 12278197 is about 3504.0258275304. The cubic root of 12278197 is about 230.6985504596.

The spelling of 12278197 in words is "twelve million, two hundred seventy-eight thousand, one hundred ninety-seven".