12665427 has 16 divisors (see below), whose sum is σ = 17276928. Its totient is φ = 8251200.

The previous prime is 12665423. The next prime is 12665441. The reversal of 12665427 is 72456621.

It is not a de Polignac number, because 12665427 - 2² = 12665423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12665423) 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, 32878 + ... + 33260.

It is an arithmetic number, because the mean of its divisors is an integer number (1079808).

Almost surely, 2^12665427 is an apocalyptic number.

12665427 is a deficient number, since it is larger than the sum of its proper divisors (4611501).

12665427 is a wasteful number, since it uses less digits than its factorization.

12665427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its digits is 20160, while the sum is 33.

The square root of 12665427 is about 3558.8519216174. The cubic root of 12665427 is about 233.0987504076.

The spelling of 12665427 in words is "twelve million, six hundred sixty-five thousand, four hundred twenty-seven".