12278899 has 4 divisors (see below), whose sum is σ = 12368664. Its totient is φ = 12189136.

The previous prime is 12278887. The next prime is 12278909. The reversal of 12278899 is 99887221.

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

It is a cyclic number.

It is not a de Polignac number, because 12278899 - 2¹¹ = 12276851 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12278809) 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, 44677 + ... + 44950.

It is an arithmetic number, because the mean of its divisors is an integer number (3092166).

Almost surely, 2^12278899 is an apocalyptic number.

12278899 is a deficient number, since it is larger than the sum of its proper divisors (89765).

12278899 is an equidigital number, since it uses as much as digits as its factorization.

12278899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89764.

The product of its digits is 145152, while the sum is 46.

The square root of 12278899 is about 3504.1259965932. The cubic root of 12278899 is about 230.7029470686.

The spelling of 12278899 in words is "twelve million, two hundred seventy-eight thousand, eight hundred ninety-nine".