12278949 has 4 divisors (see below), whose sum is σ = 16371936. Its totient is φ = 8185964.

The previous prime is 12278933. The next prime is 12278957. The reversal of 12278949 is 94987221.

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 not a de Polignac number, because 12278949 - 2⁴ = 12278933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12278949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278909) 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, 2046489 + ... + 2046494.

It is an arithmetic number, because the mean of its divisors is an integer number (4092984).

Almost surely, 2^12278949 is an apocalyptic number.

It is an amenable number.

12278949 is a deficient number, since it is larger than the sum of its proper divisors (4092987).

12278949 is an equidigital number, since it uses as much as digits as its factorization.

12278949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092986.

The product of its digits is 72576, while the sum is 42.

The square root of 12278949 is about 3504.1331310326. The cubic root of 12278949 is about 230.7032602110.

The spelling of 12278949 in words is "twelve million, two hundred seventy-eight thousand, nine hundred forty-nine".