12109270 has 64 divisors (see below), whose sum is σ = 25505280. Its totient is φ = 4105728.

The previous prime is 12109267. The next prime is 12109271. The reversal of 12109270 is 7290121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12109271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74209 + ... + 74371.

It is an arithmetic number, because the mean of its divisors is an integer number (398520).

Almost surely, 2^12109270 is an apocalyptic number.

12109270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12109270 is an abundant number, since it is smaller than the sum of its proper divisors (13396010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12109270 is a wasteful number, since it uses less digits than its factorization.

12109270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12109270 is about 3479.8376398907. The cubic root of 12109270 is about 229.6356550268.

Adding to 12109270 its reverse (7290121), we get a palindrome (19399391).

The spelling of 12109270 in words is "twelve million, one hundred nine thousand, two hundred seventy".