12109065 has 16 divisors (see below), whose sum is σ = 20000256. Its totient is φ = 6249600.

The previous prime is 12109057. The next prime is 12109067. The reversal of 12109065 is 56090121.

It is not a de Polignac number, because 12109065 - 2³ = 12109057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12109067) 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, 12556 + ... + 13485.

It is an arithmetic number, because the mean of its divisors is an integer number (1250016).

Almost surely, 2^12109065 is an apocalyptic number.

12109065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12109065 is a deficient number, since it is larger than the sum of its proper divisors (7891191).

12109065 is a wasteful number, since it uses less digits than its factorization.

12109065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26080.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 12109065 is about 3479.8081843688. The cubic root of 12109065 is about 229.6343591718.

Adding to 12109065 its reverse (56090121), we get a palindrome (68199186).

The spelling of 12109065 in words is "twelve million, one hundred nine thousand, sixty-five".