12278897 has 4 divisors (see below), whose sum is σ = 12340800. Its totient is φ = 12216996.

The previous prime is 12278887. The next prime is 12278909. The reversal of 12278897 is 79887221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79887221 = 283 ⋅282287.

It is a cyclic number.

It is not a de Polignac number, because 12278897 - 2¹⁰ = 12277873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12278837) 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, 30653 + ... + 31050.

It is an arithmetic number, because the mean of its divisors is an integer number (3085200).

Almost surely, 2^12278897 is an apocalyptic number.

It is an amenable number.

12278897 is a deficient number, since it is larger than the sum of its proper divisors (61903).

12278897 is an equidigital number, since it uses as much as digits as its factorization.

12278897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61902.

The product of its digits is 112896, while the sum is 44.

The square root of 12278897 is about 3504.1257112153. The cubic root of 12278897 is about 230.7029345429.

The spelling of 12278897 in words is "twelve million, two hundred seventy-eight thousand, eight hundred ninety-seven".