12138127 has 2 divisors, whose sum is σ = 12138128. Its totient is φ = 12138126.

The previous prime is 12138107. The next prime is 12138151. The reversal of 12138127 is 72183121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12138127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12138107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069063 + 6069064.

It is an arithmetic number, because the mean of its divisors is an integer number (6069064).

Almost surely, 2^12138127 is an apocalyptic number.

12138127 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138127 is an equidigital number, since it uses as much as digits as its factorization.

12138127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 12138127 is about 3483.9814867476. The cubic root of 12138127 is about 229.8179214287.

The spelling of 12138127 in words is "twelve million, one hundred thirty-eight thousand, one hundred twenty-seven".