12278530 has 16 divisors (see below), whose sum is σ = 24110784. Its totient is φ = 4464880.

The previous prime is 12278501. The next prime is 12278531. The reversal of 12278530 is 3587221.

12278530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12278531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55702 + ... + 55921.

It is an arithmetic number, because the mean of its divisors is an integer number (1506924).

Almost surely, 2^12278530 is an apocalyptic number.

12278530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12278530 is a deficient number, since it is larger than the sum of its proper divisors (11832254).

12278530 is a wasteful number, since it uses less digits than its factorization.

12278530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111641.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 12278530 is about 3504.0733439813. The cubic root of 12278530 is about 230.7006360514.

The spelling of 12278530 in words is "twelve million, two hundred seventy-eight thousand, five hundred thirty".