12278955 has 16 divisors (see below), whose sum is σ = 21157920. Its totient is φ = 6044928.

The previous prime is 12278933. The next prime is 12278957. The reversal of 12278955 is 55987221.

12278955 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12278955 - 2⁹ = 12278443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12278957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31290 + ... + 31679.

It is an arithmetic number, because the mean of its divisors is an integer number (1322370).

Almost surely, 2^12278955 is an apocalyptic number.

12278955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12278955 is a deficient number, since it is larger than the sum of its proper divisors (8878965).

12278955 is a wasteful number, since it uses less digits than its factorization.

12278955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62990.

The product of its digits is 50400, while the sum is 39.

The square root of 12278955 is about 3504.1339871643. The cubic root of 12278955 is about 230.7032977880.

The spelling of 12278955 in words is "twelve million, two hundred seventy-eight thousand, nine hundred fifty-five".